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

1 Answer

Nov 23, 2015

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)#

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