Equal amounts of two acids—HCl and HCO2H (formic acid)—are placed in aqueous solution. When equilibrium has been achieved, the HCl solution has a much greater electrical conductivity than the HCO2H solution. Which reaction is more product-favored at equilibrium?
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Chapter 3 Solutions
Chemistry & Chemical Reactivity
- Complete each of these reactions by filling in the blanks. Predict whether each reaction is product-favored or reactant-favored, and explain your reasoning. (a) _________ (aq) + Br(aq) NH3(aq) + HBr(aq) (b) CH3COOH(aq) + CN(aq) ________ (aq) + HCN(aq) (c) ________ (aq)+H2O () NH3(aq) + OH(aq)arrow_forwardMost naturally occurring acids are weak acids. Lactic acid is one example. CH3CH(OH)CO2H(s)+H2O(l)H3O+(aq)+CH3CH(OH)CO2(aq) If you place some lactic acid in water, it will ionize to a small extent, and an equilibrium will be established. Suggest some experiments to prow that this is a weak acid and that the establishment of equilibrium is a reversible process.arrow_forwardDescribe any thermochemical (heat of reaction) evidence for the Arrhenius concept.arrow_forward
- Aqueous Ammonia Solution (with phenolphthalein) NH3 (aq) + H2O (l) = NH4+1 (aq) + OH-1 (aq) What happens to equilibrium by adding HCl to the solution? The reactants are colorless and products are pink.arrow_forwardMethanoic acid is also called formic acid. It has the chemical formula HCOOH(l). It is a colourless fuming liquid that is mainly used as a preservative. It exhibits the following equilibrium in water:HCOOH(aq) + H2O(l) → HCOO–(aq) + H3O+(aq) 4) The concentration of the hydroxide ion, OH-(aq), in an aqueous solution is 2.5 x 10–3 mol/L. What is the pH of the solution? PLEASE HELP THIS IS VERY URGENTarrow_forwardWrite the equilibrium constant expression for this reaction: 2 H* (aq) + C₂0 (aq) H₂C₂O4(aq) X Sarrow_forward
- Use Le Chatelier’s principle to determine whether the equilibrium for the endothermic reaction below shifts to the left, right, or does not change under each condition listed: 4Fe(s) + 3O2(g) → 2Fe2O3(aq) The pressure is increased The temperature is raised Some iron is added Some oxygen is removedarrow_forwardWhat is the equilibrium expression for the following reaction? 2A(aq) + 3B(aq) ⇌ C(s)arrow_forwardThe dissociation of acetic acid, CH,COOH, has an equilibrium constant at 25°C of 1.8 x 10-5. CH,COOH(aq) = CH,COO-(aq) + H*(aq) If the equilibrium concentration of CH,COOH is 0.46 moles in 0.500 L of water and that of CH,CO is 8.1 x 10-3 moles in the same 0.500 L, calculate the concentration of H+ for the reaction.arrow_forward
- What is the equilibrium expression for the following reaction? CH4(g) + 2O2(g) ⇌ CO2(g) + 2H2O(g)arrow_forwardConsider the following chemical reaction at equilibrium: NH₃(aq) + H₂O(l) ⇌ NH₄⁺(aq) + HO⁻(aq) If one drop of aqueous sodium hydroxide (NaOH) is added, in which direction will the equilibrium shift? A) reactants B) products C) neither the reactants nor the productsarrow_forwardWrite the equilibrium constant expression for this reaction: H,SO,(aq) 2 H (aq)+SO (aq)arrow_forward
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