The acid ionization hydrolysis constant of `Zn^(2+) is 1.0xx 10^(-9) ` which of the following statement are incorrect ?

Options

A. The `[H_3O^(+) ]` ion concentration in 0.001 M `Zn Cl_2` solution is `1.0 xx 10^(4) `
B. The pH of 0.001 `M ZnCl_2 ` solution is 6
C. The basic dissociation constant of `Zn(OH)^(+) is 1.0 xx 10^(-5) `
D. The basic dissociation constant of `Zn(OH)^(+) is 1.0 xx 10^(5)`

Answer

A, D

Explanation

`K_(h_1) = ( K_W)/( K_(b_2) ) rArr K_(h_2 ) = ( 1xx 10 ^(_14) )/( 1 xx 10 ^(_19) ) = 10 ^(-5) `
` pH = 7 - ( P^(K_(b_2)))/( 2) - (1)/(2) log C = 7 -(5)/(2) - (1)/(2) log 10 ^(-3) = 6`
` therefore [H^(+) ] = 10 ^(-6) `