Reference no: EM132591002

1) Which of the following chemical reactions does not represent an oxidation/reduction?

1.  Fe (s) + O2 (g) → Fe2O3 (s)
2. PCl5 (s) + H2O (l) → H3PO4 (aq) + 5 HCl (aq)
3. 2 Al (s) + 6 HCl (aq) → 2 AlCl3 (s) + 3 H2 (g)
4. C4H8 (g) + 12 O2 (g) → 4 CO2 (g) + 4 H2O (g)

2)Identify the concentrations (in molarity) of the following recipes: 

a. 123.65 mg of NaIO3 in 402.6 mL of acetone.

b. 200.25 mg of NaOCl in 250.0 mL of acetone.

c. If the solutions made in a & b were mixed according to the following reaction:

NaIO3 (soln) + NaOCl (soln) → NaIO4 (s) + NaCl (soln)

Please provide the final [Na+] in solution

3)How much of a 3.56M NaOH solution would it take to completely react with 2.875 mL of a 1.32M MgCl2 solution? What is the theoretical yield of Mg(OH)2 (s) produced by this reaction? 

4) What type of reaction is described in question 5? If you obtained 150.0 mg of Mg(OH)2(s) from the reaction, what is your percent yield?

5) What is the molarity of a solution of 185.63 mg of potassium phosphate in 50 mL of water? (Phosphate is PO43-)

6) Balance the equation, then determine what volume of a 12M HCl solution is required to produce 3L of H2 (g) at STP if you began with 6g of Mg:

Mg (s) + HCl → H2 (g) + MgCl2 (aq)