pH of which of the following solutions is not affected by dilution?

Question

pH of which of the following solutions is not affected by dilution? (A) 0.01 M NaHCO3 (B) 0.01 M NaH2PO4 (C) 0.01 M CH3COONH4 (D) All of these

Tardigrade Admin · Accepted Answer

Aqueous solution of a salt of a weak acid and a weak base acts as a buffer solution. The pH of a buffer does not change on dilution. HCO3- (from NaHCO3) and H2PO4- (from NaH2PO4) are amphiprotic anions. The pH of solution containing amphiprotic anions do not change on dilution.

Q. $p H$ of which of the following solutions is not affected by dilution?

$0.01 M N a H C O_{3}$

$0.01 M N a H_{2} P O_{4}$

$0.01 M C H_{3} COON H_{4}$

All of these

Q. pH of which of the following solutions is not affected by dilution?

0.01MNaHCO3​

0.01MNaH2​PO4​

0.01MCH3​COONH4​

All of these

Q. $p H$ of which of the following solutions is not affected by dilution?

$0.01 M N a H C O_{3}$

$0.01 M N a H_{2} P O_{4}$

$0.01 M C H_{3} COON H_{4}$