At a certain temperature,12.5g of cholesteryl alum is dissolved in 23.8g of water, which is exactly saturated. The density of the solution is 1.21g/cm.

At a certain temperature,12.5g of cholesteryl alum is dissolved in 23.8g of water, which is exactly saturated. The density of the solution is 1.21g/cm.

12.5 G biliverite, CuSO4*5H2O, the amount of substance is 0.05 mol
The mass of CuSO4 was 9 g, and the mass of H2O was 4.5 g
Therefore, the total water mass is 23.8 g+4.5 g==28.3 g
Mass fraction of copper sulfate:9/(23.8+12.5)==24.79%
The mass concentration of copper sulfate is
C=1000× mass fraction × density/mole mass ==1000×0.2479×1.21/160==1.875 mol/L

At a certain temperature,12.5 g of cholesteryl alum was dissolved in 23.8 g of water, which exactly reached saturation. The density of the solution was 1.21 g/cm. The amount and concentration of copper sulfate in the solution were obtained At a certain temperature,12.5 g of cholesteryl alum is dissolved in 23.8 g of water, which is exactly saturated. The density of the solution is 1.21 g/cm. The amount and concentration of copper sulfate in the solution are obtained

Total mass of solution =23.8 g +12.5 g =36.3 g
Because the density is 1.21g/cm3
So volume is 30ml =0.03L
The amount of 12.5 g of gallite (copper sulfate pentahydrate-250 g/mol) is 0.05 mol
Therefore, the concentration of copper sulfate in the solution is 0.05mol÷0.03L=1.67mol/L