A) 100 ppm
B) 1,000 ppm
C) 5,000 ppm
D) 10,000 ppm
Correct Answer: D
Solution :
Ppm of \[CaC{{O}_{3}}=?\] |
Degree of hardness \[=\frac{weight\,\,of\,hardness\,\,cau\sin g\,\,salt}{Mw}\times 100\] |
1 ppm=1 part \[CaC{{O}_{3}}\] eq in \[{{10}^{6}}\]parts water \[ppm\,\,of\,\,CaC{{O}_{3}}=\,\frac{\left( \frac{0.73}{146}+\frac{0.81}{162} \right)\times 100}{100}\times {{10}^{6}}\]\[={{10}^{4}}ppm\] |
\[=10,000\,\,ppm\] |
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