January 22, 2017

Homework Help: Chemistry

Posted by Jamie on Saturday, May 10, 2014 at 5:33pm.

How would you write these chemical reactions?Can someone do one or two reactions for each problem, so I could get an idea of to them? ..I'm nit sure how most of the oeoducts wouls turn out..especially if it is a precipitate.

5. When Mn^2+ ions are separated from the mixture, they undergo a series of oxidizing and reducing steps. Write the reactions that describes these processes.

(a) Oxidation: Mn^2+(aq) + H2O2(aq) ---->
(b) Reduction: MnO2(s) + H2O2(aq) ---->
(c) Oxidation: Mn^2+(aq) + BiO3^-(aq) ---->

6. Ammonia is used to separate Fe^3+ from Cu^2+ and Zn^2+ from Al^3+. In each of these cases, one ion forms a precipitate, and the other ion remains in solution as a complex. Write chemical equations for each of the following reactions.

(a) Fe^3+(aq) + NH3(aq) + H2O(l) ---->
(b) Cu^2+(aq) + NH3(aq) + H2O(l) ---->
(c) Zn^2+(aq) + NH3(aq) + H2O(l) ---->
(d) Al^3+(aq) + NH3(aq) + H2O(l) ---->

7. Al^3+ and Zn^2+ ions are amphoteric. Describe how the amphoteric nature of these ions is shown in your testing.

(a) Al(OH)3(s) + H^+(aq) ---->
(b) Al(OH)3(s) + OH^-(aq) ---->
(c) Zn(OH)2(s) + H^+(aq) ---->
(d) Zn(OH)2(s) + OH^-(aq) ---->

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