Osaretinugo3937 Osaretinugo3937

20-02-2024
Chemistry

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RH₂ (ion exchange resin) can replace Ca₂⁺ in hard water. 1 L of hard water after passing through RH₂ has pH = 2. Hence, hardness in ppm of Ca₂⁺ is:
a) 20 ppm
b) 40 ppm
c) 60 ppm
d) 80 ppm

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