Question

What is the concentration if $10mL$ of $HCl$ which was titrated with $40mL$ of $0.10M$ $NaOH$?

• A. $2.0M$
• B. $0.40M$
• C. $0.10M$
• D. $0.025M$

Answer 1

The correct option is B $0.40M$

For an acid to be neutralized by base, milliequivalents of acid = milliequivalents of base

$\Rightarrow {\text{(Normality)}}_{acid}\times {\text{(Volume)}}_{acid}=$${\text{(Normality)}}_{base}\times {\text{(Volume)}}_{base}$

$\Rightarrow M_{acid}\times 10=(0.1\times 1)\times 40$

$\Rightarrow {\text{M}}_{acid}=0.4M$