The impure 7 g of NaCl is dissolved in water and then treated with excess of AgNO 3 solution. The weight of precipitate of AgCl is found to the 10 g . The % purity of NaCl is :

Question

The impure 7 g of NaCl is dissolved in water and then treated with excess of AgNO 3 ​ solution. The weight of precipitate of AgCl is found to the 10 g . The % purity of NaCl is :

TestHub · Accepted Answer

No. of moles of Cl − in NaCl = No. of moles of Cl − in AgCl 1 × no. of moles of NaCl = 1 × no. of moles of AgCl 58.5 m NaCl ​ ​ = 143.5 10 ​ ⇒ m NaCl ​ = 4.076 g % of purity of NaCl = 7 4.076 ​ × 100 = 58.23%

Chemistry - Stoichiometry Question with Solution | TestHub

Options:

Doubts & Discussion