What is the value of carbonate hardness of water sample if 100 mL of it took 5 mL of 0.09 N HCl solution ? (Molecular weight of Na₂CO₃ = 106)

Options

(a) 4.50 mg-eq/L
(b) 1.80 mg-eq/L
(c) 0.042 mg-eq/L
(d) 477.00 mg-eq/L

Correct Answer:

4.50 mg-eq/L

Explanation:

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