Question

In the reaction `Ti(s)_ + HNO_3(aq) -> Ti^(3+)(aq) + NO(g)`, which element is oxidized and which is reduced?

Answer 1

Titanium metal is oxidized: `TirarrTi^(3+)`;

Nitrogen is reduced: `NO_3^(-)(V)rarr NO(II)`

Explanation:

Reduction reaction:

`NO_3^(-) + 4H^+ + 3e^(-) rarr NO(g) + 2H_2O(l)` `(i)`

Oxidation reaction:
`Ti(s) rarr Ti^(3+)(aq) + 3e^-` `(ii)`

`(i) + (ii):`

`Ti(s) + NO_3^(-) +4H^+ rarr Ti^(3+)(aq) + NO(g) + 2H_2O(l)`