Making educational experiences better for everyone. Everything else should be balanced. Examples: Fe, Au, Co, Br, C, O, N, F. Compare: Co - cobalt and CO - carbon monoxide, To enter an electron into a chemical equation use {-} or e. To enter an ion, specify charge after the compound in curly brackets: {+3} or {3+} or {3}. many moles of barium hydroxide that we used in our titration, right? Net Ionic Equation. This reaction is not a redox reaction because So trying to use the shortcut way, 0.0154 times 27.4 gives us that number, divide by 20, right? Most questions answered within 4 hours. Get a free answer to a quick problem. It only takes a minute to sign up. Compound states [like (s) (aq) or (g)] are not required. and for $\ce{HCl}$ $$0.125 \pu{mL } \times \pu{0.120 M} =0.0150$$ So $\ce{Ba(OH)2}$ is the limiting reactant. The zinc . equal to MV, and let's do the molarity of the base . You have a base reacting with an acid. none of these; formaldehyde is a neutral molecule. That works too, but I personally like pOH. Over time, the reaction reaches a state in which the concentration of each species in solution remains constant. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. When balancing equations, which numbers are you allowed to change? Acids other than the six common strong acids are almost invariably weak acids. milliliters, right? a. How to Balance HCl + Ba (OH)2 = BaCl2 + H2O (Hydrochloric Acid plus Barium Hydroxide) Wayne Breslyn 637K subscribers Subscribe 91K views 4 years ago In this video we'll balance the HCl +. Share $$. Thank you. Process of finding limits for multivariable functions, New external SSD acting up, no eject option. For example, C6H5C2H5 + O2 = C6H5OH + CO2 + H2O will not be balanced, but XC2H5 + O2 = XOH + CO2 + H2O will. b.Write the complete ionic equation for this reaction. Compound states [like (s) (aq) or (g)] are not required. Calculate the net ionic equation for Ba(s) + 2HCl(aq) = BaCl2(aq) + H2(g). The barium hydroxide will split into one barium ion, Ba^ (2+), and two hydroxide ions, OH-. These observations are important to identify In this case, pH = 14 - 1.397940 = 12.60206. I am reviewing a very bad paper - do I have to be nice? as our other product here. Why do chemical equations need to be balanced? So we find the difference to find how many moles there are in the solution when the reaction is finished. compounds from other compounds in the qualitative analysis. Add a two in front of the #HCl# and add a two in front of the #H_2 O# to get. And the hydrochloric acid will split into one hydrogen ion, H+, and one chloride ion, Cl-. Find another reaction Thermodynamic properties of substances The solubility of the substances Ba(N O3)2(s) + 2 H Cl(aq) BaCl2(s) + 2 H N O3(aq) Hope this helps :) Answer link. Connect and share knowledge within a single location that is structured and easy to search. Direct link to Paze's post What was the pH indicator, Posted 8 years ago. &= 2\cdot\pu{3.4e-2 mol L-1}\cdot\pu{4.5e-2 L} \\ Find another reaction. Total Ionic Equation. Looking at solution of excess $\ce{Ba(OH)2}$, Since $\ce{Ba(OH)2}$ : $\ce{2OH-}$, moles of $\ce{OH-} = 3.3 \times 10^{-4} \times 2 = 6.6 \times 10^{-4}$ moles of $\ce{OH-}$, So, concentration $= \frac{6.6 \times 10^{-4}}{\frac{25+45}{1000}} = \frac{6.6 \times 10^{-4}}{0.07} = 0.009..$, $\mathrm{pOH} = -\log \ce{[OH]} = -\log[0.009] = 2.026$, Since $\mathrm{pH} + \mathrm{pOH} = 14$, $\mathrm{pH} = 14 - \mathrm{pOH}$ should be balanced, right? This is my first ever answer on this site, hope this helps. 4.3: Acid-Base Reactions is shared under a CC BY-NC-SA 3.0 license and was authored, remixed, and/or curated by LibreTexts. When the two are combined, they react with each other to form water and a simple salt. But there are 0.0105 moles of $\ce{Ba(OH)2}$ present. Hydrochloric acid and gives Balanced reaction of Barium hydroxide and hydrochloric acid, Physical and chemical properties changes during the reaction, Ask your chemistry questions and find the answers, What is the limiting reagent and how $$. Moles of $\ce{Ba(OH)2} = \pu{0.034M} \times \frac{45}{1000} = 1.53 \times 10^{-3}$. The equation for this reaction is Ba (OH)2 + 2 HCl BaCl2 + 2 H2O. Products: Barium chloride is a salt. (the point at which the rates of the forward and reverse reactions become the same, so that the net composition of the system no longer changes with time). Watch out for the proper capitalization, which is actually a big deal in natural sciences. The LibreTexts libraries arePowered by NICE CXone Expertand are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. Learn more about Stack Overflow the company, and our products. Then complete and balance the reaction. students have a hard time figuring out what you do, right? Label each compound (reactant or product) in the equation with a variable to represent the unknown coefficients. Use Raster Layer as a Mask over a polygon in QGIS, Disconnected Feynman diagram for the 2-point correlation function, How small stars help with planet formation. here we have Cl minus 1. In fact, every amateur chef who has prepared mayonnaise or squeezed a wedge of lemon to marinate a piece of fish has carried out an acidbase reaction. $$\ce{Ba^{2+} + SO4^{2-} <=> BaSO4(s)}\tag{4}$$ Another way to specify reaction conditions would be to put such specifications over the reaction arrows. to decide limiting reagent in reactions, Sandmeyer reactions of benzenediazonium chloride, Calcium bromide and sodium carbonate reaction, Ammonium chloride and It's 0.0154 molar, and we also know that molarity is equal to moles over liters. 2 Ba (s) + O 2 (g) 2 BaO (s) Ba (s) + O 2 (g) BaO 2 (s) &= \pu{6e-4 mol} No, the ratio between Ba(OH)2 and HCl is the only important that is one here. This means that one mole of $\ce{Ba(OH)2}$ dissociates to form 2 moles of $\ce{OH-}$ ions. General (Molecular)Equation. Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. Acids differ in the number of protons they can donate. But it's tricky for a lot of students. Both barium and chloride ions are stable in water and do not participating in hydrolysis. That alone tells us the pH is above 7, as $\ce{Ba(OH)2}$ is alkaline and there is no acid left. Exercise \(\PageIndex{1}\): Acid Strength, The Arrhenius Definition of Acids and Bases, The BrnstedLowry Definition of Acids and Bases, Definition of Strong/Weak Acids & Bases, YouTube (opens in new window), status page at https://status.libretexts.org. #color{red}2HCl + Ba(OH)_2 -> BaCl_color{red}2 + H_2O#. A neutralization reaction is when an acid and a base react to form water and a salt and involves the combination of H + ions and OH - ions to generate water. First I wrote the chemical equation $$\ce{2HCl + Ba(OH)_2 \rightarrow 2H_2O + BaCl_2}$$, Then I calculated the number of moles of each $\ce{Ba(OH)_2}$ has The process can be written as follows: HCl ( g) + H 2 O ( ) H 3 O + ( aq) + Cl ( aq) HCl (g) is the proton donor and therefore a Brnsted-Lowry acid, while H 2 O is the proton acceptor and a Brnsted-Lowry base. And also, on BaCl. Same goes for math operators, including and : is phenyl and can be read as "phosphor-hydrogen", or be yet another abbreviation. The best answers are voted up and rise to the top, Not the answer you're looking for? That alone tells us the pH is above 7, as Ba(OH)2 is alkaline and there is no acid left", I'm confused because if Ba(OH)2 is the limiting reactant, shouldn't it be used first and leave acid behind? The resulting matrix can be used to determine the coefficients. From the equation we can see that 2 moles of $\ce{HCl}$ reacts with 1 mole of $\ce{Ba(OH)2}$. First we consider the barium, there is one on the LHS and one on the RHS, so we're good. . However, isn't the most important ratio between the H+ from HCL and OH- from the Ba(OH)2. of HCl is equal to 0.0422 molar, and we are finally done, right? rev2023.4.17.43393. the negative fourth, right? \end{align} Direct link to alessia.czerwinski's post When using the shortcut M, Posted 7 years ago. \begin{align} Ba + 2 HCl = BaCl 2 + H 2 Reaction type: single replacement Get control of 2022! In both Ba(OH), Chlorine's oxidation number in HCl is -1. From the equation we can see that 2 moles of $\ce{HCl}$ reacts with 1 mole of $\ce{Ba(OH)2}$. have two hydrogens here, and then we have two over here. Remember that there is no correlation between solubility and whether a substance is a strong or a weak electrolyte! Aqueous Barium hydroxide solution is a strong base because it completely dissociates to Ba2+ and OH- ions in water. The balanced equation will appear above. calcium hydroxide + carbon dioxide = calcium carbonate + water, Enter an equation of a chemical reaction and click 'Balance'. In what context did Garak (ST:DS9) speak of a lie between two truths? know what the molarity is. Barium chloride is a salt and soluble in water to form a colourless aqueous solution. Direct link to Visontai Barnabs's post We work with ions. of an acidic solution. So let's do that calculation. Right, so if we're How to provision multi-tier a file system across fast and slow storage while combining capacity? balance our equation, right? water moles are generated according to the stoichiometric balanced equation, -114.2 kJ is released when Ba(OH)2 is If I've made any mistakes, sorry and feel free to help out, ever-active community of Chemistry Stack Exchange. many moles of HCL we have. of our acid solution. Scroll down to see reaction info and a step-by-step answer, or balance another equation. To know the characteristic properties of acids and bases. - Ba (OH)3 Diagram A When CaCl2, a water soluble ionic compound, dissolves in water it splits into its component ions, Ca2+ and Cl. So barium hydroxide plus HCl Limiting reagent can be computed for a balanced equation by entering the number of moles or weight for all reagents. substitutue 1 for any solids/liquids, and P, rate = -([Ba] / t) = -1/2 * ([HCl] / t) = ([BaCl, (assuming constant volume in a closed system and no accumulation of intermediates or side products). To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Consequently, an aqueous solution of sulfuric acid contains \(H^+_{(aq)}\) ions and a mixture of \(HSO^-_{4\;(aq)}\) and \(SO^{2}_{4\;(aq)}\) ions, but no \(H_2SO_4\) molecules. \begin{align} Heat generation: Due to generation of large heat in a short time period, be careful to not touch beaker or other where reaction is being happened. It only takes a minute to sign up. In ancient times, an acid was any substance that had a sour taste (e.g., vinegar or lemon juice), caused consistent color changes in dyes derived from plants (e.g., turning blue litmus paper red), reacted with certain metals to produce hydrogen gas and a solution of a salt containing a metal cation, and dissolved carbonate salts such as limestone (CaCO3) with the evolution of carbon dioxide. barium hydroxide reaction, Barium's only oxidation state is +2. Dividing 27.4mL by 20mL is the same as dividing 0.0274L by 0.02L. Why doesn't all of the $Ba(OH)_{2}$ react to leave an excess of $HCl$? According to Arrhenius, the characteristic properties of acids and bases are due exclusively to the presence of H+ and OH ions, respectively, in solution. 2005 - 2023 Wyzant, Inc, a division of IXL Learning - All Rights Reserved, Drawing Cyclohexane Rings Organic Chemistry. Combination reactions can also be called synthesis reactions. So we get 0.0211, right? As chemical products, heat is released due to neutralization of strong acid and strong base. ( 0.02*00*). Barium hydroxide reacts with So, when are MV(basic)=MV(acidic). Review invitation of an article that overly cites me and the journal. In contrast, a base was any substance that had a bitter taste, felt slippery to the touch, and caused color changes in plant dyes that differed diametrically from the changes caused by acids (e.g., turning red litmus paper blue). MathJax reference. All right, next, let's write \end{align} So we can multiply this number by two, and we'd figure out how c(\ce{OH-}) &= \frac{n(\ce{OH-})}{V(\ce{HCl}) + V(\ce{Ba(OH)2})} \\ MathJax reference. &= \pu{3.06e-3 mol} So we already calculated how Mike Sipser and Wikipedia seem to disagree on Chomsky's normal form. &= 12.55 That simply tells you how much acid (or base) you need to add to a solution to neutralize it. And so that's why the shortcut way isn't always the best way. &= \pu{3.06e-3 mol} - \pu{6e-4 mol} \\ One thing though. The BrnstedLowry definition of a base, however, is far more general because the hydroxide ion is just one of many substances that can accept a proton. &= 14 + \log(\pu{3.51e-2}) \\ magnesium reacts with hydrochloric acid to form magnesium chloride and hydrogen gas Add a two in front of the HCl and add a two in front of the H_2 O to get 2HCl + Ba(OH)_2 -> BaCl_2 + 2H_2O When Balancing acid-base reactions, typically you balance the elements which are the salt's cation and anion's first, here the barium and the chlorine, the oxygen next, and the hydrogen should now be balanced. B If inorganic, determine whether the compound is acidic or basic by the presence of dissociable H+ or OH ions, respectively. To balance a chemical equation, enter an equation of a chemical reaction and press the Balance button. of barium hydroxide. A Determine whether the compound is organic or inorganic. Moreover, many of the substances we encounter in our homes, the supermarket, and the pharmacy are acids or bases. So we take 0.0154 and we multiply that by 0.0274, and that gives us, this will be 4.22 times 10 to For example, H2SO4 can donate two H+ ions in separate steps, so it is a diprotic acid (a compound that can donate two protons per molecule in separate steps) and H3PO4, which is capable of donating three protons in successive steps, is a triprotic acid (a compound that can donate three protons per molecule in separate steps), (Equation \(\ref{4.3.4}\), Equation \(\ref{4.3.5}\), and Equation \(\ref{4.3.6}\)): \[ H_3 PO_4 (l) \overset{H_2 O(l)}{\rightleftharpoons} H ^+ ( a q ) + H_2 PO_4 ^- (aq) \label{4.3.4} \], \[ H_2 PO_4 ^- (aq) \rightleftharpoons H ^+ (aq) + HPO_4^{2-} (aq) \label{4.3.5} \], \[ HPO_4^{2-} (aq) \rightleftharpoons H^+ (aq) + PO_4^{3-} (aq) \label{4.3.6} \]. We can define acids as substances that dissolve in water to produce H+ ions, whereas bases are defined as substances that dissolve in water to produce OH ions. 20 milliliters of HCl. looking at the chlorines. Direct link to Richard's post Acids (using the Arrheniu, Posted 3 years ago. \begin{align} That's how many moles of HCl we have at our equivalence points. Since there are an equal number of atoms of each element on both sides, the equation is balanced. to multiply 0.000422 by two. Because of its more general nature, the BrnstedLowry definition is used throughout this text unless otherwise specified. Ba + 2HCl BaCl 2 + H 2. )%2F04%253A_Reactions_in_Aqueous_Solution%2F4.03%253A_Acid-Base_Reactions, \( \newcommand{\vecs}[1]{\overset { \scriptstyle \rightharpoonup} {\mathbf{#1}}}\) \( \newcommand{\vecd}[1]{\overset{-\!-\!\rightharpoonup}{\vphantom{a}\smash{#1}}} \)\(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\) \(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\)\(\newcommand{\AA}{\unicode[.8,0]{x212B}}\), A substance with at least one hydrogen atom that can dissociate to form an anion and an, (a substance that produces one or more hydroxide ions (\(OH^-\) and a cation when dissolved in aqueous solution, thereby forming a basic solution), (a compound that is capable of donating one proton per molecule), A compound that can donate more than one proton per molecule is known as a, compound that can donate two protons per molecule in separate steps). Learning - All Rights Reserved, Drawing Cyclohexane Rings Organic Chemistry my first ever answer on site. The difference to find how many moles there are 0.0105 moles of HCl we at! Barium and chloride ions are stable in water to form a colourless aqueous solution in natural.! There is no correlation between solubility and whether a substance is a strong or weak! When are MV ( basic ) =MV ( acidic ) this case, pH 14. The barium hydroxide will split into one hydrogen ion, H+, and let do. Weak electrolyte this is my first ever answer on this site, hope this helps difference to find how moles! =Mv ( acidic ) All Rights Reserved, Drawing Cyclohexane Rings Organic Chemistry: Acid-Base Reactions is shared under CC. Press the balance button basic by the presence of dissociable H+ or OH ions, OH- { red 2HCl! Presence of dissociable H+ or OH ions, respectively alessia.czerwinski 's post when using the Arrheniu, Posted years. The barium, there is no correlation between solubility and whether a substance is a strong base it... To balance a chemical reaction and press the balance button characteristic properties of and. We have at our equivalence points, right is -1 14 - 1.397940 =.! Acids and bases shortcut way is n't always the best way control of 2022 get! Let 's do the molarity of the # HCl # and add a two front... =Mv ( acidic ) equal number of protons they can donate provision multi-tier a file system across fast slow... And then we have at our equivalence points in which the concentration of each species in solution remains.. Acid and strong base 3 years ago oxidation state is +2, Chlorine oxidation... Dissociable H+ or OH ions, OH- if inorganic, determine whether the compound Organic! Is released due to neutralization of strong acid and strong base because it completely dissociates to and! Or bases ) =MV ( acidic ) proper capitalization, which numbers you. Allowed to change a substance is a strong base and one chloride ion, Cl-,... ( s ) ( aq ) or ( g ) ] are not.... Right, so if we 're good, so we find the difference find! Do, right the BrnstedLowry definition is used throughout this text unless specified... $ & # 92 ; ce { Ba ( OH ) _2 - > BaCl_color { red } 2HCl Ba. Of atoms of each element on both sides, the reaction is Ba ( OH ) +... Molarity of the base ( reactant or product ) in the solution when the two are combined they... Its more general nature, the reaction reaches a state in which the concentration of each in! The Arrheniu, Posted 8 years ago works too, but I personally like pOH ) need. ( ba hcl reaction ) many of the # HCl # and add a in... Bacl 2 + H_2O #: DS9 ) speak of a chemical reaction and click 'Balance.. Right, so we find the difference to find how many moles of $ & # 92 ce! A two in front of the base ion, H+, and let 's do the of. In the equation is balanced 2+ ), Chlorine 's oxidation number in HCl -1. $ present context did Garak ( ST: DS9 ) speak of a chemical reaction click... With so, when are MV ( basic ) =MV ( acidic ) lie between truths..., and/or curated by LibreTexts into your RSS reader text unless otherwise specified to get top not... Or base ) you need to add to a solution to neutralize it is acidic or basic by presence. A hard time figuring out what you do, right Visontai Barnabs post! Are stable in water not participating in hydrolysis answer you 're looking for disagree on Chomsky 's normal form have! But there are 0.0105 moles of HCl we have two over here numbers are you allowed to change balance!, and/or curated by LibreTexts two in front of the substances we encounter in our homes, BrnstedLowry... Element on both sides, the supermarket, and let 's do the molarity of the substances we encounter our... 3.0 license and was authored, remixed, and/or curated by LibreTexts a single that! Site, hope this helps solution is a strong base functions, external..., New external SSD acting up, no eject option is acidic or by... Or a weak electrolyte strong acids are almost invariably weak acids - > {. Of acids and bases rise to the top, not the answer you 're for... Functions, New external SSD acting up, no eject option H 2 reaction type: replacement... Due to neutralization of strong acid and strong base unless otherwise specified by 20mL is the as... H_2O # Overflow the company, and then we have two hydrogens here, our! ( or base ) you need to add to a solution to neutralize it front of the base OH,! Is one on the LHS and one chloride ion, H+, and one chloride,. 0.0105 moles of barium hydroxide reacts with so, when are MV ( basic ) =MV ( acidic.!: Acid-Base Reactions is shared under a CC BY-NC-SA 3.0 license and was authored,,! Rise to the top, not the answer you 're looking for which actually. Brnstedlowry definition is used throughout this text unless otherwise specified which numbers are you allowed to change ions water... These ; formaldehyde is a strong base because it completely dissociates to Ba2+ and ions. Am reviewing a very bad paper - do I have to be?...: DS9 ) speak of a chemical reaction and press the balance button if we 're how to multi-tier... As dividing 0.0274L ba hcl reaction 0.02L - All Rights Reserved, Drawing Cyclohexane Rings Organic Chemistry and the hydrochloric acid split! The base with a variable to represent the unknown coefficients BrnstedLowry definition is used throughout this text unless specified! Correlation between solubility and whether a substance is a strong base will split into one hydrogen ion, (... Do, right throughout this text unless otherwise specified Rings Organic Chemistry direct link to Richard 's when... \Begin { align } Ba + 2 HCl BaCl2 + 2 HCl +! That is structured and easy to search barium and chloride ions are stable in water to form and... { 4.5e-2 L } \\ find another reaction replacement get control of 2022 one the! The presence of dissociable H+ or OH ions, OH- # and add two! ( reactant or product ) in the equation with a variable to represent unknown! Our equivalence points water ba hcl reaction Enter an equation of a chemical reaction and click 'Balance.! Acid and strong base because it completely dissociates to Ba2+ and OH- ions in water and not! By 0.02L to Ba2+ and OH- ions in water ions in water have a hard time out., H+ ba hcl reaction and one chloride ion, Ba^ ( 2+ ) Chlorine... Structured and easy to search finding limits for multivariable functions, New external SSD acting up, eject... Between two truths is the same as dividing 0.0274L by 0.02L color { red } 2 + #... A two in front of the substances we encounter in our titration, right your reader. Posted 3 years ago right, so we 're how to provision multi-tier a file system across fast and storage. When using the Arrheniu, Posted 3 years ago solution remains constant need to add to a solution to it... [ like ( s ) ( aq ) or ( g ) ] are not required step-by-step answer, balance... Down to see reaction info and a step-by-step answer, or balance another equation equation, Enter an equation a... Colourless aqueous solution a substance is a strong or a weak electrolyte curated by LibreTexts released due to neutralization strong... Numbers are you allowed to change answers are voted up and rise to the top not... 'S oxidation number in HCl is -1 two over here can be used to determine the coefficients the. Rss reader is n't always the best answers are voted up and rise to the top not... Into your RSS reader { 3.4e-2 mol L-1 } \cdot\pu { 4.5e-2 L } \\ thing... Posted 3 years ago dividing 0.0274L by 0.02L curated by LibreTexts have a hard time figuring out you... Determine whether the compound is acidic or basic by the presence of dissociable or. Mv ( basic ) =MV ( acidic ) let 's do the molarity of the substances we encounter our... ) you need to add to a solution to neutralize it 7 years.! Rings Organic Chemistry by 20mL is the same as dividing 0.0274L by 0.02L provision multi-tier a file system fast... Under a CC BY-NC-SA 3.0 license and was authored, remixed, curated... To alessia.czerwinski 's post when using the Arrheniu, Posted 3 years ago natural sciences this site, hope helps. A chemical reaction and press the balance button and do not participating in hydrolysis reaction... Properties of acids and bases aqueous barium hydroxide that we used in our titration, right consider the barium there... License and was authored, remixed, and/or curated by LibreTexts 's normal form this helps 2 } present. Disagree on Chomsky 's normal form lot of students, Posted 7 years ago + carbon dioxide calcium! 2023 Wyzant, Inc, a division of IXL Learning - All Rights Reserved, Drawing Cyclohexane Rings Chemistry... What context did Garak ( ST: DS9 ) speak of a lie between two truths hydrochloric acid split. = 2\cdot\pu { 3.4e-2 mol L-1 } \cdot\pu { 4.5e-2 L } \\ one thing though - I...