Question

The compound whose aqueous solution has the highest $P^H$ is

• A. NaCl
• B. $NaHCO_3$
• C. $Na_2CO_3$
• D. $NH_4Cl$

Answer 1

Answer: (C)

$Na_2CO_3$

Answer 2

The hydrolysis of NaCl gives neutral solution because it is salt of strong acid and strong base and hence, its $P^H$ is 7. $NH_4Cl$ is salt of weak base and strong acid, so its $P^H$ is less than 7. $NaHCO_3$ is also acidic whereas $Na_2CO_3$ is salt of strong base and weak acid, so its $P^H$ is more than 7.