Chemistry, asked by MGNDRA, 9 months ago

Q7. Calculate percentage of water of crystallisation in CuSO4.5H2O.

[At. wt. are Cu = 64, S = 32, O = 16, H = 1] [2]

Q8. In the reaction + ⟶ + . Why H2S is a reducing agent. [1]

Q9. Balance the following reactions: [2]

(a) + ⟶ + +

(b) + ⟶ () + +

Answers

Answered by Anonymous

Answer:

Molar mass cf CaSO4.5H2O = [64 + 32 + (16 x 4)+ 5 (2 x 1 + 16)] = 250.

Mass of water of crystallisation = 5 ( 2 x 1 + 16) = 90.

Percentage of water of crystallisation = 90/250 x 100 = 36%

Answered by mehek2440

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