Question

use the following table to answer the question.
strong acids\tweak acids\tweak bases\tstrong bases
hbr\tch₃cooh\tnh₃\tnaoh
hno₃\thf\tnh₄oh\tkoh
h₂so₄\thcn\t\tca(oh)₂
which reaction would yield a neutral salt?
○ 2naoh + h₂so₄
○ naoh + hcn
○ koh + hf
○ 2nh₄oh + h₂so₄

Explanation:

To yield a neutral salt, the reaction should be between a strong acid and a strong base.

• \( NaOH \) is a strong base (from the "Strong bases" table) and \( H_2SO_4 \) is a strong acid (from the "Strong acids" table). Their reaction (\( 2NaOH + H_2SO_4 = Na_2SO_4 + 2H_2O \)) produces \( Na_2SO_4 \), a neutral salt.
• For \( NaOH + HCN \), \( NaOH \) is strong base but \( HCN \) is weak acid, so the salt (\( NaCN \)) is basic.
• For \( KOH + HF \), \( KOH \) is strong base but \( HF \) is weak acid, so the salt (\( KF \)) is basic.
• For \( 2NH_4OH + H_2SO_4 \), \( NH_4OH \) is weak base and \( H_2SO_4 \) is strong acid, so the salt (\( (NH_4)_2SO_4 \)) is acidic.

Answer:

A. \( 2NaOH + H_2SO_4 \)