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Q.

Which of the statements are true?

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a

The equivalent weight of Ca3(PO4)2 is Mw/6

b

The equivalent weight of Na3PO4.12H2O is Mw/3

c

the equivalent weight of K2SO4 is Mw/2

d

The equivalent weight of potash alum K2SO4Al2SO43⋅24H2O is Mw/8

answer is A.

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Detailed Solution

1. Valency factor = 6Ca3+2×3PO42-3×22. Valency factor = 3Na3+1×3PO4-33. Valency factor = 2K2+1×2SO4-24. Valency factor = 8K2+1×2SO4-2Al2+3×2SO43-2×3
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