Question

The hardness of water sample (in terms of equivalents of CaCO₃) containing 10⁻³ M CaSO₄ is
(molar mass of CaSO₄ = 136 g mol⁻¹)
(A) 10 ppm (B) 50 ppm
(C) 90 ppm (D) 100 ppm

Answer 1

The hardness of water sample (in terms of equivalents of CaCO₃) containing 10⁻³ M CaSO₄ is

(molar mass of CaSO₄ = 136 g mol⁻¹)

(A) 10 ppm

(B) 50 ppm

(C) 90 ppm

(D) 100 ppm ✔✔✔

Answer 2

Answer:

The hardness of water sample (in terms of equivalents of CaCO₃) containing 10⁻³ M CaSO₄ is

(molar mass of CaSO₄ = 136 g mol⁻¹)

(A) 10 ppm

(B) 50 ppm

(C) 90 ppm

(D) 100 ppm