Given that a mixture of two solutions has the following ions, [tex]Na^{+}[/tex],[tex]PO_{4}^{3-}[/tex],[tex]V^{3+}[/tex], and [tex]Cl^{-}[/tex]. The products formed in the reaction would be NaCl and VPO[tex]_{4}[/tex]. As per the solubiltiy rules, all chloride salts are soluble, all phosphate salts are insoluble except those with [tex]Na^{+},K^{+} and NH_{4}^{+}[/tex].
The equation representing the reaction of these ions:
[tex]Na^{+}[/tex](aq) + [tex]PO_{4}^{3-}[/tex](aq)+[tex]V^{3+}[/tex]+ [tex]Cl^{-}[/tex]-->[tex]VPO_{4}(s)+Na^{+}(aq)+Cl^{-}(aq)[/tex]
So, the insoluble product will be vanadium phosphate [tex]VPO_{4}[/tex]
Correct answer: a. [tex]VPO_{4}[/tex]
