What is the solubility, S, of calcium hydroxide, Ca(OH)2, if Kpfor Ca(OH)2 is 6.

Question

What is the solubility, S, of calcium hydroxide, Ca(OH)2, if Kpfor Ca(OH)2 is 6.5x10-6? O a 1.2 x 102M b. 22 x10-2 M O c. 2.5 x 10-3 M O d. 2.5 x 10-2 M Select one: o a 3N2(e)+4H20() 2N2H4)+N204() 0 d N2(g) + 2H2(g) N2H4(1) What is entropy? Select one: a. the internal energy (E) of a system plus pressure times volume b. the energy used to move an object a distance (d) against a force (F) c. a thermodynamic quantity that is a measure of the randomness or disorder in a system d. energy flow associated with temperature changes

Explanation / Answer

1) kSP of Ca(OH)2 = S(2S)^2

6.5*10^-6 = S(2S)^2

S = solubility of Ca(OH)2 = 0.012

                             = 1.2*10^-2 M
answer: a

2) answer: b

in b system moves from high energy to lower energy.so that, it will be spontaneous.

3) answer: C

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