Which of the following salts when dissolved in water will form a solution that will change blue litmus to red?

doctabbey

5 years ago

NH4Cl + H2O = NH4OH + HCl

NH4Cl dissociates in water to form NH4OH which is a weak base and HCl which is a strong acid.

HCl, being a strong acid, predominates the solution and makes it acidic to turn blue litmus to red.

Idowuayomideolaniyi

3 months ago

A. CH₃COONa (Sodium ethanoate)
Formed from a weak acid (ethanoic acid) and a strong base (NaOH).
Its solution is basic, not acidic.
❌ Will not turn blue litmus red.
B. NH₄Cl (Ammonium chloride)
Formed from a weak base (NH₃) and a strong acid (HCl).
The NH₄⁺ ion hydrolyzes in water to produce H⁺ ions.
The solution is acidic.
✅ Will turn blue litmus red.
C. NaCl (Sodium chloride)
Formed from a strong acid (HCl) and strong base (NaOH).
Solution is neutral.
❌ No effect on litmus.
D. KCl (Potassium chloride)
Formed from a strong acid (HCl) and strong base (KOH).
Solution is neutral.
❌ No effect on litmus.
✅ Correct Answer: B. NH₄Cl

Pelumibenjamin

4 years ago

The question is wrong admin. I ought to be "Which of the following salts when dissolved in water will NOT form a solution that will change blue litmus to red?" Because when water is added to the Option A, C, D, the solution formed will turn blue litmus read because the are acidic.

Johncak316

3 years ago

My School, please effect these changes. The correct option is A because the solution of sodium ethanoate in water will result to sodium hydroxide and ethanoic acid. Now sodium hydroxide being a strong base will turn the solution from blue to red. Alright??

Importantly, note that An acid turns red litmus paper blue whereas a base to blue litmus paper red.
..... Many thanks!!