A) 1,000 ppm
B) 10,000 ppm
C) 100 ppm
D) 5,000 ppm
Correct Answer: B
Solution :
\[{{n}_{eq.}}CaC{{O}_{3}}={{n}_{eq}}Ca{{(HC{{O}_{3}})}_{2}}+{{n}_{eq}}Mg{{(HC{{O}_{3}})}_{2}}\] or,\[\frac{W}{100}\times 2=\frac{0.81}{162}\times 2+\frac{0.73}{146}\times 2\] \[\therefore \]\[w=1.0\] \[\therefore \]Hardness \[=\frac{1.0}{100}\times {{10}^{6}}=10000ppm\] Correct option : (b)You need to login to perform this action.
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