Question

Molarity and Dilution

How many moles are needed in a 100. mL solution of a 0.10M CuSO4 5H2O solution?

Answer 1

Answer: The moles needed are 0.01.

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

$Molarity=\frac{n\times 1000}{V_s}$

where,

n = moles of solute $(CuSO_4.5H_2O)$ = ?  

$V_s$ = volume of solution in ml  

Now put all the given values in the formula of molarity, we get

$0.10=\frac{n\times 1000}{100}$

$n=\frac{0.10\times 100}{1000}=0.01$

Therefore, the moles needed are 0.01.