Question

What volume (in mL) of 0.0887 M MgF2 solution is needed to make 275.0 mL of 0.0224 M MgF2 solution?

Answer 1

Answer : 69.44 mL

Explanation : Here we can use the formula as $M_{1} V_{1} =M _{2}V_{2}$

Where we have the value of $M_{1}$ = 0.0887 M
$M_{2}$  = 0.0224 M and 
$V_{2}$ = 275 mL

So, substituting the above values in the given equation we get,

0.0887 X x = 275 X 0.0224

Therefore, x = 69.44 mL

So it will require 69.44 mL.