What Percentage Of The Ca2+ Remains Unprecipitated

What percentage of Ca2 + remains without rain? 3

Question: Add 75.0 ml of 1.48 × 10 × 2 M Na2SO4 (water) sample to 75.0 ml of 1.24 × 10 × 2 M Ca (NO3) 2 (water).

What percentage of Ca2 + remains without rain?

(Ksp CaSO4 = 9.1x106)

NaSO4 = 1.5 * 10 2 M * 0.075 L = 0.001125 mol

Ca (NO3) 2 = 1.26 * 10 2 M * 0.075 = 0.000945 mol

0.001125 mol 0.000945 mol = 0.00018 mol

Okay, and we only have two ions.

(0.00018 / 0.000945) * 2 = 38% without ppt

Note: The answer is not very accurate, so the answer is approximately%.

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