Ca(OH)2 + H3PO4 = CaHPO4 + 2H2O From This Chemical Equitation Calculate The Equivalent Weight Of H3PO4 ?? Answer The Question With Explanation !

1 Answer
Narad T.
Jul 15, 2018

The equivalent weight is #=49#

Explanation:

The reaction is

#Ca(OH)_2 + H_3PO_4rarrCaHPO_4+2H_2O#

In this reaction

#H_3PO_4rarrHPO_4^(2-)+2H^+#

Orthophosphoric acid leaves #2# hydrogen ions.

Hence, its valency factor is #=2#

#"Equivalent weight " = "Molecular Weight "/2#

Molecular weight #=1*3+31+4*16=98#

Therefore,

The equivalent weight is #=98/2=49#

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