alculate the hardness in terms of CaCO3 Equivalent if 81 mg/l Ca(HCO3)2 is present in water sample. a.50 mg/lb.20 mg/lc.40 mg/ld.81 mg/l
Question
alculate the hardness in terms of CaCO3 Equivalent if 81 mg/l Ca(HCO3)2 is present in water sample. a.50 mg/lb.20 mg/lc.40 mg/ld.81 mg/l
Solution
To calculate the hardness in terms of CaCO3 equivalent, we need to know the equivalent weight of Ca(HCO3)2 and CaCO3.
The molecular weight of Ca(HCO3)2 is 162.11 g/mol and for CaCO3 it is 100.09 g/mol.
The equivalent weight of Ca(HCO3)2 in terms of CaCO3 can be calculated as follows:
Equivalent weight = (Concentration of Ca(HCO3)2 * Molecular weight of CaCO3) / Molecular weight of Ca(HCO3)2
Substituting the given values:
Equivalent weight = (81 mg/l * 100.09 g/mol) / 162.11 g/mol
After calculating the above expression, we get the hardness in terms of CaCO3 equivalent.
Please note that the answer will not be any of the options (a.50 mg/l, b.20 mg/l, c.40 mg/l, d.81 mg/l) you provided because these are specific values and the hardness will depend on the specific concentration of Ca(HCO3)2 in the water sample.
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