Question

If 11 g of oxalic acid are dissolved in 500 mL of solution (density = 1.1 g mL${}^{-1}$), what is the mass % of oxalic acid in solution?

• A. 1%
  
• B. 2%
  
• C. 3%
  
• D. 4%
  

Answer 1

The correct option is B 2%

given $11g$ oxalic acid

volume of solution = $500ml$

density $=1.1=\frac{mass}{volume}$

mass of solution =$1.1\times 500$

weight % of oxalic acid = $\frac{11}{1.1\times 500}\times 100$

$=2\%$