Answer to Question #103679 in General Chemistry for Malathy

Question

Determine the solubility of the following in mol/L at 20°C.

a) NH4Cl ______in cold water and ______hot water b)Na2CO3 ______in cold water and_____ hot water. Kindly show calculations

Answer 1

a) s₂₀=372.0 g/L (20°C)

s₁₀₀=740.8 g/L (100 °C)

M(NH₄Cl)=53 g/mol

S₂₀=s₂₀/M=372/53=7 mol/L

S₁₀₀=s₁₀₀/M=740.8/53=14 mol/L

b) s₂₀=218.0 g/L (20 °C)

s₁₀₀=436.0 g/L (100 °C)

M(Na₂CO₃)=106 g/mol

S₂₀=s₂₀/M=218/106=2.06 mol/L

S₁₀₀=s₁₀₀/M=436/106=4.11 mol/L