Question

The mass of NaCl produced when 200 mL of 2.00 M HCl solution is neutralised with NaOH is

• A. 2.34 g
• B. 23.4 g
• C. 234 g
• D. None of these

Answer 1

Answer: (B)

23.4 g

Answer 2

$\underset{\text{1 mol}}{ {HCl}}+NaOH \to \underset{\text{1 mol}}{ { NaCl}}+H_{2}O$ Moles of $HCl=\left(\frac{200}{1000}L\right)\times\left(2\,mol\,L^{-1}\right)$ $=0.4\,mol$ Moles of $NaCl$ produced=Moles of $HCl$ $= 0.4 mol$ Mass of $NaCl$ produced $=\left(0.4\,mol\right)\times\left(58.5\,g\,mol^{-1}\right)$ $=23.4\,g$