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Reaction with Metals

13. H3PO4 + N...

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13. H3PO4 + NaOH➡️ Na2HPO4 Q.what is the equipment wt of H3PO4 ?

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Q. In the reaction

N a O H + H_{3} P O_{4} \to N a_{2} H P O_{4} + H_{2} O

, the equivalent weight of

H_{3} P O_{4}

(phosphoric acid) is:

Q. In the reaction:

H_{3} P O_{4} + 2 N a O H \to N a_{2} H P O_{4}

The equivalent weight of

H_{3} P O_{4}

Q. Assertion: In the reaction:

2 N a O H + H_{3} P O_{4} \to N a_{2} H P O_{4} + 2 H_{2} O

The Equivalent weight of

H_{3} P O_{4}

\frac{M}{3}

, where M is its molar mass
Reason: Equivalent weight

= \frac{Molar mass}{n-factor}

P_{2} O_{6}

H_{3} P O_{4}

0.405

g sample is reacted with water (

P_{2} O_{5} + 3 H_{2} O \to 2 H_{3} P O_{4}

), and the resulting solution is titrated with

0.25 M

N a O H

42.5

N a_{2} H P O_{4}

). The percentage purity of

H_{3} P O_{4}

as nearest integer is :

Q. In the reaction

2 N a O H + H_{3} P O_{4} \to N a_{2} H P O_{4} + 2 H_{2} O

, the Equivalent weight of the acid is

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