Question

In: Chemistry

Questions Part A: Based on the analysis of your local water, would you classify its hardness...

Questions

Part A:
Based on the analysis of your local water, would you classify its hardness as soft, moderate, hard, or very hard? Explain your answer.

Part B
Approximately how much calcium would you ingest by drinking eight 8-oz glasses of your local water? Hint: 1 oz (fluid ounce) = 29.57 mL.

Part C
Assume an average minimum daily requirement for calcium is 1,150 mg. Calculate what percentage of your daily requirements could be met by drinking 1.0 L of your local water.

Expert Solution

A.

Measurement (ppm) nature of water

17.1 soft

17-60 slightly hard

60-120 moderately hard

120-180 hard

over 180 very hard

B. If the local water hardness = x ppm (x mg / L)

Then 8oz glasses = 29.57 X 8 mL = 236.56mL

so in 1L of water we have x mg of calcium

so in 1mL = x/1000 mg

so in 236.56 mL amount of calcium = x X 236.56 / 1000 mg ( so you can put the value of x in this)

C. If we need 1150 mg of calcium

The amount of calcium in 1L of water = x mg

% of requirement fullfilled = 1150 X x / 100 %

queen_honey_blossom answered 2 months ago

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