Chemistry, asked by charukhushi2281, 1 year ago

Why phosphate oxalate and borate fluoride are interfering?

Answers

Answered by pawanism67

In acidic medium these salts produce their corresponding acids like oxalic acid, phosphoric acid, hydrofluoric acid, boric acid and tartaric acid. For example, barium oxalate reacts with HCl and produces oxalic acid.

BaC2O4 + 2HCl ⟶ BaCl2 + H2C2O4

These interfering acids are weak acids so they do not dissociate completely and remain in solution in their unionised form. Equilibrium is developed between dissociated and un-dissociated acid.

H2C2O4 ⇌ 2H+ + C2O42-

Hydrochloric acid is a strong acid and is ionised completely.

HCl ⟶ H+ + Cl-

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