Question

Questions 1. The Merck Index give the solubilities of benzoic acid in water at various temperature. Plot these data (temperature vs. solubility) and relate the data to your recrystallization of benzoic acid. 2. Although the hydrogen carbonate ion is a weak base, it successfully deprotonates carboxylic acids and protonated amines. Use LeChatelier's principle to explain this observation.

Answer 1

1. Benzoic acid or benzene carboxylic acid, is a colorless crystalline solid,and a monobasic aromatic acid.It is used as food preservative.It is soluble in alcohol. Benzoic acid dissolves slightly in cold water. The carboxylic acid group is polar, the bulk of the benzoic acid molecule is non-polar (water is polar). It is only the carboxylic group that is polar. In addition, there are no internal stabilizing structures that favor carboxylate, -COO(-), over carboxylic acid, -COOH. So benzoic acid is sparingly soluble in water.

When the temperature becomes high the solubility increases.i.e. increases the length of the hydrogen bond, so the ionization occurs

solubility of benzoic acid in water
plot af Benzoic acid (SHcos 1 Meach index Nat!! Scubab 20 40 60 80 100 Temperature in celcius

recrystalization is for the purification of benzoic acid

2. answer is below

Le chatelien's principle It states that is a constraint {change in pressure, temperature of a reactant) is applied to a system in equillibrium, the equillibriums will shift so as to tend to constraint the contract the effect of constraint egi coerbors dioxide was dissolved in water, reacting to produce hydrogen - carbonate , a weak acid that subsequently ionized to yield bicarbonate and hydrogen ion dissolution of Coca Co (aq) hydrolysis of cos can+40 7 Hoa (aq) ionization of you as (99) ? Hoge (aq) +He can