The Ksp for Cr(OH)3 is 1.6 × 10–30. The molar solubility of this compound in water is
1.6 × 10–30/27
$\sqrt[2]{1.6 \times 10^{–30}}$
$\sqrt[4]{1.6 \times 10^{–30}}$
$\sqrt[4]{1.6 \times 10^{–30} / \ 27}$
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A vessel at 1000 K contains CO2 with a pressure of 0.5 atm. Some of the CO2 is converted into CO on the addition of graphite. If the total pressure at equilibrium is 0.8 atm, the value of K is