Hey I need help writing balanced net ionic equations for the following two:
a) the reaction of dilute nitric acid with solid aluminum oxide
b)the reaction of nitrous acid (HNO2) with potassium permanganate to produce nitrate and Mn(II) ions.
2006-09-20 16:08:32 · 2 answers · asked by swejedi7 1 in Science & Mathematics ➔ Chemistry
first ecuation is correct, the second one is not, although mathematically it is ok, cause the charges don't add up right, and the number of exchanged electrons is not constant. A more acid environment would be needed (H+, cause HNO2 is a weak acid)
5*HNO2 + 2*KMnO4 + H+---> 5*NO3- + 2*Mn2+ + 2*K+ + 3*H2O
abd since it is a redox reaction and we need to pay attention to the electrons involved (N changes from +3 to +5, and Mn changes from +7 to +2).
2006-09-20 19:47:10 · answer #1 · answered by andreicnx 3 · 0⤊ 0⤋
a) 6HNO3 (aq) + Al2O3 (s) -------> 3H2O (l) + 2Al 3+ (aq) + 6NO3 - (aq)
b) 3HNO2 (aq) + KMnO4 (s) -------> 3NO3 - (aq) + Mn 2+ (aq) + K+ (aq) + H3O+ (aq)
2006-09-20 16:38:49 · answer #2 · answered by عبد الله (ドラゴン) 5 · 0⤊ 1⤋