If 01800 G of Impure Soda Ash (Na₂CO₃) Is Titrated with with 15.66

Multiple Choice

If 0.1800 g of impure soda ash (Na₂CO₃) is titrated with 15.66 mL of 0.1082 M HCl, what is the percent purity of the soda ash?
Na₂CO₃(aq) + 2 HCl(aq) ? 2 NaCl(aq) + H₂O( $\ell$ ) + CO₂(g)

A) 17.96%
B) 49.89%
C) 50.11%
D) 94.13%
E) 99.77%