The hardness of a water sample (in terms of equivalents of CaCO3) containing 10-3 M CaSO4 is: (molar mass of CaSO4 = 136 g mol-1)

Question

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

Tardigrade Admin · Accepted Answer

ppm of CaCO3 (10-3 × 103) × 100 = 100 ppm

Q. The hardness of a water sample (in terms of equivalents of $C a C O_{3}$ ) containing $1 0^{- 3} M C a S O_{4}$ is :
(molar mass of $C a S O_{4} = 136 g m o l^{- 1}$ )

$100 pp m$

$50 pp m$

$10 pp m$

$90 pp m$

ppm of $C a C O_{3}$
$(1 0^{- 3} \times 1 0^{3}) \times 100 = 100 pp m$

Q. The hardness of a water sample (in terms of equivalents of CaCO3​) containing 10−3MCaSO4​ is : (molar mass of CaSO4​=136gmol−1)

100ppm

50ppm

10ppm

90ppm