Multiple choice

Direction: Following chemical species were reported for water sample from a well:

 
Specials Concentration (milli equivalent/L)
Choride (Cl–) 15
Sulphate (SO42–) 15
Carbonate (CO32–) 05
Bicarbonate (HCO3–) 30
Cacium (Ca2+) 12
Magnesium (Mg2+) 18
pH 8.5

Total hardness in mg/L as CaCO3 is

  1. 1500

  2. 2000

  3. 3000

  4. 5000
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

 $\text{Total hardness as} CaCO_3 \\ \hspace{1cm} = (12 \times 50 + 18 \times 50) = 1500\\ \text{Note:- Milliequivalent/L}\\ \text{Equivalent weight of} CaCO_3 = 50$

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