Question

What volume of a 1 M solution of hydrochloric acid is needed to neutralize 80 ml of a 0.5 M sodium hydroxide solution?

• A. 320 ml
• B. 160 ml
• C. 80 ml
• D. 40 ml
• E. 20 ml

Answer 1

The correct option is D 40 ml

$M_1{V}_1=M_2{V}_2$
$M_1=$ 1 M
$V_1=$ ?
$M_2=$ $0.5$ M
$V_2=$ $80$ ml
$1\times V_1=0.5\times 80$
$V_1=40$ml