Calculate the molar solubility of copper(ii) arsenate (cu3(aso4)2) in water. use 7.6 x 10^-36 as the solubility product constant of cu3(aso4)2.
9.1 x 10^-4 m
3.4 x 10^-2 m
3.7 x 10^-8 m
8.7 x 10^-2 m

The correct answer is option C.

Explanation:

                                     3S       2S

The solubility product of the will be given by:

The molar solubility of copper(II) arsenate (Cu3(AsO4)2) in water is .

Hence ,the correct answer is option C.

the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.