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July 27, 2015

Homework Help: chemistry

Posted by sos on Monday, September 23, 2013 at 5:37pm.

Which of the following is a precipitation reaction?

I. 2 Mg (s) + O2 (g) → 2 MgO (s)

II. SO3 (g) + 2 H2O (l) → H3O+ (aq) + HSO4- (aq)

III. Pb2+ (aq) + CrO42- (aq) → PbCrO4 (s)

IV. 2 H2O (g) → 2 H2 (g) + O2 (g)

V. Ag+ (aq) + 2 NH3 (aq) → [Ag(NH3)2]+ (aq)

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