Question

1000 g aqueous solution of CaCO₃ contains 10 g of calcium carbonate. Hardness of the solution is ______.

विकल्प

• 10 ppm

• 100 ppm

• 1000 ppm

• 10000 ppm

Answer 1

1000 g aqueous solution of CaCO₃ contains 10 g of calcium carbonate. Hardness of the solution is 10000 ppm.

Explanation:

10 g CaCO₃ present in 10³ g of water

10⁶ g water contains = 10,000 mg of CaCO₃

10,000 of CaCO₃ = 10,000 ppm