Question

What is the final concentration when 5 ml of a 2.5M copper sulphate solution is diluted to 750 ml?

Answer 1

Answer: The final concentration when 5 ml of a 2.5M copper sulphate solution is diluted to 750 ml is 0.017 M

Explanation:

According to the dilution law,

$M_1V_1=M_2V_2$

where,  

$M_1$ = molarity of stock $CuSO_4$ solution = 2.5 M

$V_1$ = volume of stock $CuSO_4$solution = 5 ml  

$M_1$ = molarity of diluted $CuSO_4$ solution = ?

$V_1$ = volume of diluted $CuSO_4$ solution = 750 ml

Putting in the values we get:

$2.5\times 5=M_2\times 750$

$M_2=0.017$

Therefore the final concentration when 5 ml of a 2.5M copper sulphate solution is diluted to 750 ml is 0.017 M