When potash alum is dissolved in water, the total number of ions furnish in aqueous solution is

Options

A. thirty two
B. ten
C. four
D. eight

Answer

D

Explanation

Potash is an old name for potassium salt. potash alum in `K_(2)SO_(4)A1_(2)(SO_(4))_(3) 4H_(2)O`. When crystalline aluminium potassium sulphate is dissolved is dissolved in water we get following particles.
`K_(2)SO_(4).A1_(2)(SO_(4))_(3).24H_(2)O overset (H_(2)O)rarr2K^(+)(aq) + 2A1^(3+) (aq) 4SO_(4)^(2-) (aq) + 24H_(2)O`