Question

Identify the correct decreasing order of precipitation power of flocculating ion added, from following.

Options

• \[\ce{Na+ > Ba^{2+} > Al^{3+}}\]

• \[\ce{Al^{3+} > Ba^{2+} > Na+}\]

• \[\ce{Al^{3+} >  Na+ > Ba^{2+}}\]

• \[\ce{Ba^{2+} > Al^{3+} >  Na+}\]

Answer 1

\[\ce{Al^{3+} > Ba^{2+} > Na+}\]

Explanation:

The flocculation power of cation decreases with decrease in the valence of cation. So, the correct order is

\[\ce{Al^{3+} > Ba^{2+} > Na+}\]