Question

calculate the mass，W of the CuSO4 · 5H2Osample needed to prepare 100 ml of：

Table 1. PREPARATION OF THE SOLUTIONS BY THE DISSOLUTION TECHNIQUE Calculate mass, W of the CuSO4.5H20(s) sample, needed to prepare 100 ml of: Molar mass of CuSO4.5H20 M, gram Volume of the prepared CuSO4 solution, V, liter 0.100M CuSO4 solution 0.300M CuSO4 solution 0.500M CuSO4 solution W gram W, gram W, gram 250. g/mol 0.100

Answer 1

Solution :

Mass of CuSO4.5H2O is calculated as,

Mass = Molarity x Molar mass x Volume in L

A) 0.100 M CuSO4 solution:

Mass (W) = Molarity x Molar mass x Volume in L

W = 0.100 M x 250 g mol-1 x 0.100 L = 2.5 g

B) 0.300 M CuSO4 Solution:

Mass (W) = 0.300 M x 250 g mol-1 x 0.100 L = 7.5 g

C) 0.500 M CuSO4 solution :

Mass(W) = 0.500 M x 250 g mol-1 x 0.100 L = 12.5 g