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melamori03 [73]
3 years ago
14

What's the different between activity and concentration?

Chemistry
1 answer:
Flauer [41]3 years ago
8 0
<span>Activity was created to measure effective concentration of a substance in non ideal solutions</span>
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Aluminium sulfate hydrate al2(so4)3.xh2o contains 13.63% al by mass. calculate x, that is, the number of water molecules associa
Advocard [28]
MAl₂(SO₄)₃·xH₂O:
(mAl×2) + (mS×3) + (mO×12) + (mH₂O×x)
(27×2)+(32×3)+(16×12)+(x×18) = 342 + 18x [g]
mAl₂: 27×2 = 54 [g]

54g ---------- 13,63%
342+18x ---- 100%
0,1363(342+18x) = 54
46,6146 + 2,4534x = 54
2,4534x = 7,3854
x ≈ 3

>>> Al₂(SO₄)₃·3H₂O <<<<
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1 year ago
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sergij07 [2.7K]
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