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Makovka662 [10]
3 years ago
5

A groundwater contains the following cations (expressed as the cation):

Engineering
2 answers:
Hunter-Best [27]3 years ago
6 0

Answer:

208 mg/L

Explanation:

Only Mg++ and Ca++ causes hardness not Na+

Given

Mg++ = 20 mg/L

Ca++ = 50 mg/L

Hardness\ of\ water = C^{2+}\times \frac{equivalent\ weight\ of\ CaCO3}{equivalent\ mass\ of\ C^{2+}}\ +\ mg^{2+}\times \frac{equivalent\ weight\ of\ CaCO3}{equivalent\ mass\ of\ mg^{2+}}

= 50\times\frac{50}{20}\ +\ 20\times\frac{50}{12}

= 208.33 mg/L \approx 208mg/L

Oliga [24]3 years ago
5 0

Answer:

50mg/L

Explanation:

CaCO3 -> Ca++ + CO2

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