Question

4. To how much water should 50 mL of 12 M hydrochloric acid be added to

produce o 40 M solution?

Answer 1

Answer : The volume of water added are, 15 mL

Explanation :

Formula used :

`M_1V_1=M_2V_2`

where,

`M_1\text{ and }V_1` are the initial molarity and volume of HCl.

`M_2\text{ and }V_2` are the final molarity and volume of water.

We are given:

`M_1=12M\\V_1=50mL\\M_2=40M\\V_2=?`

Putting values in above equation, we get:

`12M* 50mL=40M* V_2\\\\V_2=15mL`

Hence, the volume of water added are, 15 mL