Summer Assignment Help

If you need more help with a problem, please do not hesitate to email me at kevans63@hotmail.com. I will be happy to walk you through other problems.

Reminders:

Watch out for solids and gases as reactants - they will not form ions.

Watch out for the weak acids - they do not form ions. The only acids that will form ions are the Magnificent 7 - HCl, HBr, HI, HNO₃, HClO₃, HClO₄, and H₂SO₄.

Do not forget about the rule for the product H₂CO₃. This substance is very unstable and will not be formed as a product. It will continue to decompose into H₂O and CO₂.

With the above rule, do not forget about the product NH₄OH. This is also a substance that is very unstable and will not be formed as a product. It will continue to decompose into H₂O and NH₃

NIE Worksheet 1

Problems 14 and 15 are redox reactions. A redox reaction is an oxidation-reduction reaction. There is a phrase that makes remembering redox reactions pretty easy:

LEO - Lose Electrons Oxidized.

GER - Gain Electrons Reduced.

VERY IMPORTANT - if one substance is oxidized, then one must be reduced (vice versa).

14. The Fe³⁺ is reduced which means is will gain an electron. If it gains an electron, that will take the charge to a +2. If the iron ion is reduced, then the iodide ion must be oxidized, which means it will lose an electron. The I^- will lose an electron and will now have a zero charge. Remember, iodine is a diatomic molecule and when it is by itself as a neutral atom (zero charge) it will exist as I₂. The final equation is as follows:

Fe³⁺ + I^- --> Fe²⁺ + I₂

15. This is also a redox reaction. The Sn²⁺ as a reactant is oxidized to a +4 charge. (Sn only has 2 possible charges - +2 and +4). If the Sn²⁺ is oxidized then the Fe³⁺ must be reduced. Fe³⁺ will gain an electron to form Fe²⁺. (Iron only has +2 or +3 possible charges). The final equation is as follows:

Sn²⁺ + Fe³⁺ --> Sn⁴⁺ + Fe²⁺

NIE Worksheet 2

7. This one has a typo. It should be sodium iodide solution and not sulfuric acid. You do not have to do this one.

9. This is another redox reaction. I will give you what is oxidized and reduced and you should try to figure out the products. Use the example above. Tin is oxidized and iron is reduced.

15. This is a really different equation. Especially since I put born instead of boron. A complex compound is formed. This becomes a synthesis reaction and PH₃BCl₃ is formed.

NIE Worksheet 3

7. This equation involves a hydrogen ion transfer from the acid to the base. The acetic acid will lose the hydrogen ion and the ammonia will accept the hydrogen ion. Your products will be C₂H₃O₂^- and NH₄⁺