Question

What volume of a 0.75M solution is needed to make 500 mL of a 0.25M solution?

Answer 1

Answer: Thus 167 ml of a 0.75M solution is needed to make 500 mL of a 0.25M solution

Step-by-step explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

According to the dilution law,

`M_1V_1=M_2V_2`

where,

`M_1` = molarity of concentrated solution = 0.75 M

`V_1` = volume of concentrated solution = ?

`C_2` = concentration of dilute solution= 0.25 M

`V_2` = volume of dilute solution= 500 ml

Putting in the values we get:

`0.75* V_1=0.25* 500`

`V_1=167ml`

Thus 167 ml of a 0.75M solution is needed to make 500 mL of a 0.25M solution