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One litre 2M Na(3)PO(4) and 1 litre of 1...

One litre 2M `Na_(3)PO_(4)` and 1 litre of 1M `BaCl_(2)` solutions are mixed. What is the normality of phosphate ions in the filtrate?

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The correct Answer is:
2
eq. `Na_(3)PO_(4)=1xx2xx3=6`
eq. `BaCl_(2)=1xx1xx2=2`
`therefore` eq. `PO_(4)^(3-)` ppted = 2
`therefore` eq. in filtrate = `6-2=4`
`therefore [PO_(4)^(3-)]=(4)/(1+1)=2`
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