balancing equation between Ag and HNO3

☆ 天與空 ★ ◤

2007-10-01 1:03 am

Write (a) a full equation , and (b) an ionic equation , to show the reaction between silver and concentrated nitric acid.

(( i don't know why i cannot balance it ...plz help me solve it))

回答 (1)

Uncle Michael

2007-10-01 1:15 am

✔ 最佳答案

(b)
Firstly, write the two half equations.
Ag(s) → Ag+(aq) + e-
2H+(aq) + NO3-(aq) +e- → H2O(l) + NO2(aq)

Add the two half equation together to cancel the electrons on both sides. The overall ionic equation is:
Ag(s) + 2H+(aq) + NO3-(aq) → Ag+(aq) + H2O(l) + NO2(g)

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(a)
Add one NO3- on both sides of the above ionic equation:
Ag(s) + 2H+(aq) + 2NO3-(aq) → Ag+(aq) + NO3-(aq) + H2O(l) + NO2(g)

The overall full equation is:
Ag(s) + 2HNO3(aq) → AgNO3(aq) + H2O(l) + NO2(g)

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