Question

What volume of 0.15 M HCl(aq) must be diluted to make 2.0 L of 0.050 M HCl(aq)?.

Answer 1

find the formula:

$С\times V=C1\times V1$

$0.15\times V=0.050\times 2$

$V=\frac{0.050\times2}{0.15}$

V=0.666 L