Calculate the molarity (M) of a 23% (w/v) copper sulfate solution (m.w. = 160.0 g/mol).
Answer: Molarity (M) of a 23% (w/v) copper sulfate solution:
Molarity = number of moles of solute / litres of solution
23% means 23g of Copper sulfate in 100mL of solution
Molecular weight of Copper sulfate is 160.0 g/mol
This means
160g = 1 mole of copper sulfate molecules
23g in 100mL solution = 23/160 moles = 0.144 moles of copper sulfate molecules in 100 mL solution
Molarity is no. of moles per L of solution.
So, converting the units, we get
Molarity = 0.144 moles/100mL = 1.44 moles/L (Answer)
Calculate the molarity (M) of a 23% (w/v) copper sulfate solution (m.w. = 160.0 g/mol).
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