Identify the choice that best completes the statement or answers the question. 1
ID: 998364 • Letter: I
Question
Identify the choice that best completes the statement or answers the question. 1. When acetic acid (a weak acid) is dissolved in water, which of the following will be TRUE when equi established? CH_3COOH(aq) + H_2O CH_3COO^+(aq) + H_3O^+(aq) a. Mostly reactants will be present. b. Mostly products will be present, c. A mixture of reactants and products will be present. d. No reactants or products will be present 2. Water is likely to be a POOR solvent for which types of molecules? a. molecules which can form hydrogen bonds b.nonpolar molecules c. polar molecules d. None, water is considered a universal solvent.Explanation / Answer
1. Since acetic acid is a weak acid, so upon dissolution in water the ionization of acetic acid to produce H3O+ would be low. As the concentration of hydronium ion (H3O+) is low mostly reactants would be present because most of the acetic acid would remain unionized. But there is both product and reactant present in water which makes it a mixture. Therefore, option (C) is the most appropriate answer.
2. Water is a polar solvent and we know that polar solvents dissolve polar molecules & molecules which can form hydrogen bond with water molecules so option (C) and option (A) are both soluble in water whereas option (B) which is a non-polar molecule in insoluble in water as it cannot form any sort of intermolecular bonding with water due to which there is NO dissolution. Therefore the correct option should be (B).