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Phosphoric acid is a triprotic acid. Calculate the [PO4^3-] if you start out with 5.00 M...

Phosphoric acid is a triprotic acid. Calculate the [PO4^3-] if you start out with 5.00 M phosphoric acid.

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Expert Solution

Phosphoric acid is triprotic (H₃PO₄)

Given : [H₃PO₄] = 5 M

1. ...(1)


I	5	-	0	0
C	-x	-	+x	+x
E	5-x	-	x	x

From recation (1) we get,

but, x << 5 Therefore,

Hence,

ie.

2. ...(2)

We have, and

Therefore,

we have, ,

and

Therefore,

queen_honey_blossom answered 1 year ago

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