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The 25°C evaporation of a 100 cm3 solution of K\(...

The 25°C evaporation of a 100 cm3 solution of K2CO3 to dryness gave 14g of the salt. What is the solubility of K2CO3 at 25°C? [K2CO3 = 138]

A.

0.01 mol dm3

B.

0.101 mol dm3

C.

1.01 mol dm 3

D.

10.0 mol dm3

Correct answer is C

solubility( in mol/dm^3) = massofsaltMolarMassofsalt=1000cm3volumeofsolutionincm3

                                         14138=1000cm3100

                                           1400013800=1.01mol/dm3