Question

What volume of 6 m hcl is needed to prepare 150 ml of 0.4 m hcl?

Answer 1

Answer : The volume of 6 M HCl needed is, 10 mL

Explanation :

Formula used :

$M_1V_1=M_2V_2$

where,

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

$M_2\text{ and }V_2$ are the final molarity and volume of HCl.

We are given:

$M_1=6M\\V_1=?\\M_2=0.4M\\V_2=150mL$

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

$6M\times V_1=0.4M\times 150mL\\\\V_1=10mL$

Hence, the volume of 6 M HCl needed is, 10 mL