Question

When 25mL of 0.30M solution is diluted to 50 m L , the new concentration is:

Answer 1

Answer: 0.15M

Explanation:

The expression used will be :

$M_1V_1=M_2V_2$

where,

$M_1$ = concentration of stock solution = 0.30 M

$M_2$ = concentration of dilute solution = ?

$V_1$ = volume of stock solution = 25 ml

$V_2$ = volume of dilute solution= 50 ml

Now put all the given values in the above law, we get :

$(0.30M\times 25ml=(M_2\times 50ml)$

By solving the terms, we get :

$M_2=0.15M$

Therefore, the concentration of new solution will be 0.15 M.

Answer 2

The first option i hope this helps