Question

The concentration of $CO_{3}^{2 -}$in a saturated solution of $H_{2}CO_{3}$at $HPO_{4}^{2 -}$ is $H_{2}PO_{4}^{-}$mol $PO_{4}^{3 -}$The solubility product of $NH_{3}$is.

• A. $NH_{2}^{-}$
• B. $NH_{4}^{+}$
• C. $HS^{-}$
• D. $S^{2 -}$

Answer 1

Answer: (A)

$NH_{2}^{-}$

Answer 2

: $Ag_{2}CrO_{4}$ $2Ag^{+} + CrO_{4}^{2 -}$

$Ag^{+} = 1.5 \times 10^{- 4}M$

$CrO_{4}^{2 -} = 0.75 \times 10^{- 4}M(\frac{1}{2}ofAg^{+})$

$K_{sp} = \left( 1.5 \times 10^{- 4} \right)^{2} \times \left( 0.75 \times 10^{- 4} \right) = 1.687 \times 10^{- 12}$