Name ___________________________

Note: Please "down-load" the quiz and return it to the "Quiz Box" located outside my office, Science 260. This quiz is due sometime Monday or Tuesday, 1/26 or 1/27, when you are on campus.

1. (9) Complete the following:

a) Substances that dissolve in water but do not dissociate into ions are called ________________.

b) Combustion reactions involve the chemical reaction of some reactant, such as a hydrocarbon, with the element ________________. The products a combustion reaction of a hydrocarbon are water and _________________.

c) Oxidation-reduction reactions are those which involve the transfer of one or more__________________.Given a particular chemical reaction equation, how could you determine if it is an oxidation- reduction reaction ? Comment.

2. (6) Balance the following reactions:

a) ____ P4O10 (s) + _____ H2O (l) = _____ H3PO4 (aq) Reaction to produce phosphoric acid.

b) ___ NaBH4 (s) + ____H2SO4 (aq) = ____ B2H6 (g) + ____ H2 (g) + ___Na2SO4 (aq)

3. (6) Given the partial equation for the reaction that occurs on mixing solutions of nickel (II) nitrate and sodium carbonate together. Use the solubility guidelines to determine if a precipitate is formed from this mixture.

Ni (NO3)2 (aq) + Na2CO3 (aq) = ?

If a precipitate is formed, what is it? ____________

Write a balanced net ionic equation for whatever reaction you think takes place.

4. (9) Determine the oxidation number of all species in the following:

a) H4SiO4

b) C2O4 (2-) oxalate ion

c) KMnO4 potassium permanganate

 

d) In the following reaction, supply the requested information.

H2O (l) + Cl2 (g) = HCl (aq) + HOCl (aq)

element oxidized _________ element reduced ________

oxidizing agent ___________ reducing agent _________

5. (5) For each of the ionic compounds below, tell whether it is expected to be soluble in water. For any one that is water soluble, indicate the ions formed in solution.

a) K2CO3 potassium carbonate Soluble? Yes or No. Ions formed if soluble:

b) PbS lead sulfide Soluble? Yes or No. Ions formed if soluble:

c) CuCl2 copper (II) chloride Soluble? Yes or No. Ions formed if soluble: