Question
Question: Which salt will have pH = 7 in aqueous solution?...
Which salt will have pH = 7 in aqueous solution?
A
NH4CI
B
Na2CO3
C
NaCI
D
CH3COONa
Answer
NaCI
Explanation
Solution
Salts formed from the reaction of a strong acid and a strong base yield neutral solutions (pH=7) because their constituent ions do not undergo significant hydrolysis.
- NH4Cl is formed from a weak base (NH4OH) and a strong acid (HCl), resulting in an acidic solution.
- Na2CO3 is formed from a strong base (NaOH) and a weak acid (H2CO3), resulting in a basic solution.
- NaCl is formed from a strong base (NaOH) and a strong acid (HCl), resulting in a neutral solution.
- CH3COONa is formed from a strong base (NaOH) and a weak acid (CH3COOH), resulting in a basic solution.