Answer to Question #168246 in General Chemistry for Sallau

Question

The solubility of potassium trioxochlorate (V) at 20 degree Celsius is 8.0moldm3. calculate

1. the mass which will dissolve in 250g of water to make a saturated solution.
2. the mass of potassium trioxochlorate (V) is 20g of saturated solution at 20 degree celsius

Answer 1

a) at 20 degree Celsius 7.3 g will dissolve in100 g of water  ml

250 g=250 ml

7.3=100

x=250

$x=\frac{7.3\times250}{100}=18.25$

b)с=8mol/l

M=122.548

Vs/s=0.02L

$c=\frac{m}{M\times V}$

$m=c\times M\times V=8\times122.548\times0.02=19.61 g$