Question

A negatively charged suspension of clay in water will need for precipitation the minimum amount of

• A. Aluminium chloride
• B. Potassium sulphate
• C. Sodium hydroxide
• D. Hydrochloric acid

Answer 1

The correct option is A

Aluminium chloride

A negatively charged clay suspension in water can be precipitated by minimum amount of $A{l}^{3+}\left(AlC{l}_3\right)$ because $A{l}^{3+}$ ions have maximum opposite charge, i.e., + 3 units.