How to calculate mass percent
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How to calculate mass percent

[From: ] [author: ] [Date: 11-11-18] [Hit: ]
5) x 100% = 1.97% Hydrogen.......
here's the problem:
calculate mass percent of each element in CuAl6(PO4)4(OH)8 * 4H20
the * should be a dot because it's hydrated. Can you explain how for me because I was absent when my teacher taught us this.

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CuAl6(PO4)4(OH)8 * 4H20 isn't a compound I've ever heard of.
What we need now is the mass of each component from the periodic table and add them together.

Cu = 63.5 + (Al 27x6 =162 ) + (P 31x4 = 124) + (O 16 x 28 = 448) + (H 1 x 16 = 16) = 813.5


Now take each component mass in turn and multiply it by 100%.
Cu = (63.5 / 813.5) x 100% = 7.81% Copper.
Al = (162 / 813.5) x 100% = 19.91% Alumimium
P = (124 / 813.5) x 100% = 15.42% Phosphorus.
O = (448 / 813.5) x 100% = 55.07% Oxygen.
H = (16 / 813.5) x 100% = 1.97% Hydrogen.
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