Question

In the neutralization process of $H_{3}P{O}_4$ and $NaOH$, the number of buffers formed will be__________.

• A. 3
• B. 1
• C. 2
• D. 4

Answer 1

The correct option is A 3

H3PO4has 3 replaceable or acidic protons which can be released on reaction with water molecule :
H3PO4(s) +H2O(l) ⇌ H3O+(aq) +H2PO4–(aq)
H2PO4–(aq)+ H2O(l) ⇌ H3O+(aq) + HPO42–(aq)
HPO42–(aq)+ H2O(l) ⇌ H3O+(aq) + PO43–(aq)

H2PO4– and HPO42–(aq) and PO43–(aq). All three ion can react differently with NaOH molecule to form three different solution that can act as buffer solution

Answer) 3