Question

Choose molecular and net ionic equations for the successive neutralizations of each acidic hydrogen of phosphoric...

Choose molecular and net ionic equations for the successive neutralizations of each acidic hydrogen of phosphoric acid by calcium hydroxide solution Ca3(PO4)2

is insoluble; assume that the acid salts are soluble.

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Answer #1

Molecular and ionic equations for successive neutralization

1st neutralization : 2 H3PO4 (aq) + Ca(OH)2 (aq) Ca(H2PO4)2 (aq) + 2 H2O (l)

Net ionic equation : H+ (aq) + OH- (aq) H2O (l)

2nd neutralization : Ca(H2PO4)2 (aq) + Ca(OH)2 (aq) 2 CaHPO4 (aq) + 2 H2O (l)

Net ionic equation : H+ (aq) + OH- (aq) H2O (l)

3rd neutralization : 2 CaHPO4 (aq) + Ca(OH)2 (aq) Ca3(PO4)2 (s) + 2 H2O (l)

Net ionic equation : 2 Ca2+ (aq) + 2 HPO42- (aq) + Ca2+ (aq) + 2 OH- (aq) Ca3(PO4)2 (s) + 2 H2O (l)

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