Question

If I add water to 100mL of a 0.15 M NaOH solution until the final volume is 150mL, what will the molarity of the diluted solution be?

Answer 1

Answer: The molarity of the diluted solution be 0.10 M

Explanation:

According to the dilution law,

$C_1V_1=C_2V_2$

where,

$C_1$ = concentration of concentrated solution = 0.15 M

$V_1$ = volume of concentrated solution = 100 ml

$C_2$ = concentration of diluted solution= ?

$V_2$ = volume of diluted solution= 150 ml

Putting the values we get:

$0.15\times 100=M_2\times 150$

$M_2=0.10M$

Thus the molarity of the diluted solution be 0.10 M