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Phosphoric Acid, H3PO4(aq) is a triprotic acid, meaning that one molecule of the acid has three...

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Question

Chemistry

Phosphoric Acid, H3PO4(aq) is a triprotic acid, meaning that onemolecule of the acid has three acidic protons. Estimate the pH andthe concentrations(M) of all species in a 0.300 M phosphoric acidsolution.

pKa1= 2.16 pKa2=7.21 pKa3=12.32

[H3PO4]=

[H2PO4-]=

[HPO4^2-]=

[PO4^3-]

[H+]=

[OH-]=

pH=

Answer & Explanation Solved by verified expert
4.4 Ratings (824 Votes)
Answer We are given H3PO4 0300 M pKa1 216 pKa2 721 and pKa3 1232 First dissociation First we need to put ICE table for H3PO4 H3PO4 H2O H2PO4 H3O I 030 0 0 C x x x E 030x x x Ka1 H2PO4 H3O H3PO4 Now we need to calculate Ka1 from the pKa1 We know pKa1 log    See Answer
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