Project #41979 - organic chemistry

 Chemical Reactions

Show your all work (calculations) and use the correct number of significant figures and units.

1. (15 points) Heating potassium chlorate will produce oxygen gas and potassium chloride. Write a balanced chemical equation.

2. (10 points) Consider the following chemical reaction:

2 C8H18 + 25 O2 → _16 CO2 + 18 H2O [Balanced]

What is the mole-to-mole ration between oxygen gas and carbon dioxide?

3. (25 points) Sample of 10.7 g of CO reacts “completely” with O2 to form CO2.

2 CO + O2 → _2 CO2 [Balanced]

How many grams of CO2 will be formed?

4. Urea (NH2)2CO is prepared by reacting ammonia with carbon dioxide. The byproduct is water. 637.2g of ammonia are reacted with 787.3 g of carbon dioxide.

a. (10 points) write a balanced chemical equation.

b. (5 points) Determine which of the two reactants (ammonia or carbon dioxide) is a limiting reactant. Show calculations to support your choice. No credit will be given if your supporting calculations are wrong.

c. (10 points) which of the two reactants should you use to calculate the theoretical yield (= the maximum amount possible) of urea? Explain why.

5. Consider the following chemical equation:

TiCl4(g) + 2Mg(l) → Ti(s) + 2MgCl2(l)

3.54.107g of TiCl4(g) were reacted completely and 7.91.106g of Ti(s) was obtained in the experiment.

a. (10 points) calculate the theoretical yield of Ti(s).

b. (5 points) what is the actual yield of Ti(s) in this experiment?

c. (10 points) calculate the % yield of Ti(s) in this experiment

Subject General
Due By (Pacific Time) 10/03/2014 09:00 am
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