Question

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

0.10M
0.60M
0.15M
0.30M

Answer 1

the first option i hope this helps

Answer 2

Answer: 0.15M

Step-by-step 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* 25ml=(M_2* 50ml)`

By solving the terms, we get :

`M_2=0.15M`

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