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The percentage of P(2)O(5) in diammonium...

The percentage of `P_(2)O_(5)` in diammonium hydrogen phosphate `[(NH_(4))_(2)HPO_(2))]` is

A

23.48

B

46.96

C

53.78

D

71

Text Solution

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The correct Answer is:
C
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The percentage of P_(2)O_(5) in diammonium hydrogen phosphate is:

The percentage of hydrogen in H_2O is

In a gravimetric determination of P , an aqueous solution of dihydrogen phosphate ion [H_(2)PO_(4)^(-)] is treated with a mixture of ammonium and magnesium ions to precipitate magnesium ammonium phosphate, [Mg(NH_(4))PO_(4).6H_(2)O] . This is heated and decomposed to magnesium pyrophosphate [Mg_(2)P_(2)O_(7)] , which is weighed. A solution of H_(2)PO_(4)^(-) yielded 1.054 g of Mg_(2)P_(2)O_(7) . What weight of NaH_(2)PO_(4) was present originally? (Na=23, H=1, P= 31, O=16,Mg=24)

The conjugate base of HPO_(4)^(2-) is

The conjugate acid of HPO_(4)^(2-) is

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