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6-2.Equilibrium-II (Ionic Equilibrium)
hard
નીચે આપેલા દ્રાવ્યતા વક્ર સાથેના ક્ષારની તત્ત્વયોગમિતી અને દ્રાવ્યતા ગુણાકાર અનુક્રમે જણાવો.
A
$\mathrm{X}_{2} \mathrm{Y}, 2 \times 10^{-9} \;\mathrm{M}^{3}$
B
$\mathrm{XY}_{2}, 1 \times 10^{-9} \;\mathrm{M}^{3}$
C
$\mathrm{XY}_{2}, 4 \times 10^{-9}\; \mathrm{M}^{3}$
D
$\mathrm{XY}, 2 \times 10^{-6} \;\mathrm{M}^{3}$
(JEE MAIN-2020)
Solution
From the graph and dimensions salt is : $\mathrm{XY}_{2}$
$[\mathrm{X}]=1 \times 10^{-3} \mathrm{M}$
$[\mathrm{Y}]=2 \times 10^{-3} \mathrm{M}$
$\mathrm{XY}_{2}(\mathrm{s}) \rightleftharpoons \mathrm{X}_{(\mathrm{aq}, )}^{2+}+2 \mathrm{Y}_{(\mathrm{aq})}^{-}$
$\mathrm{K_{sp}}=\left[\mathrm{X}^{2+}\right][\mathrm{Y}^-]^{2}$
$=\left(10^{-3}\right)\left(2 \times 10^{-3}\right)^{2}$
$=4 \times 10^{-9} \mathrm{M}^{3}$
Standard 11
Chemistry
