Chem 313 Chapter 10 Test Review

Chapter 10 Chem review.

1.  Balance the following equations

A. ___C7H9 +___ O2 ---> energy +___ CO2 + ___H2O B. ___Na2O2 + ___H2O ---> ___NaOH + ___ O2

C.__P4O10 + __H2O + energy---> ___H3PO4 D. __FeCl3 +__NH4OH -->__Fe(OH)3 +__NH4Cl

2.List the reactants in 1C.

3.List the products in 1D.

4.Which equation in #1 is Endothermic? ____ or Exothermic? ___

5. How does a balanced chemical equation demonstrate the Law of Conservation of Mass?

6. Write, balance and determine the type of each of the following chemical equations. Note the physical state of each reactant and product.

a.  Aqueous barium chloride combines with aqueous lithium sulfate to form solid barium sulfate and aqueous lithium chloride. Type ______

b.  Solid silver oxide breaks down to form silver metal and oxygen gas. Type ______

7. Determine the physical states of the following ionic compounds.

Lithium phosphate _____ MgCO3 _____ Barium iodide _____ (NH4)2S______

8.  Predict the products of the following chemical reactions, balance the reaction and determine its type.

a. ___C2H2 +___ O2 ---> Type ______

b. ___PbCl2 +__Mg --> Type ______

c. ___Na + ___ Cl2 --> Type ______

d. Type ______

e. ___FeI3 à Type ______

9.  Which of the following single replacement reactions will take place? If they take place, predict the products and their physical states (if possible).

___MgCl2 + ___Al -->

___ZnSO4 + ____K -->

In each of the following pairs, which element will replace the other in a reaction?

a.  tin and sodium

b.  fluorine and iodine

c.  lead and silver

d.  copper and nickel

Predict the products of the following single replacement reactions if they occur

An aqueous solution of nickel (II) sulfate is mixed with aqueous sodium hydroxide. Will a visible reaction occur? (formation of a precipitate)

A.  No, solid nickel (II) hydroxide is soluble in water

B.  No, solid sodium sulfate is soluble in water

C.  Yes, solid sodium sulfate will precipitate out of solution

D.  Yes, solid nickel (II) hydroxide will precipitate out of solution

1. When sodium metal (silver in color) and chlorine gas (yellow) are mixed in a flask, a violent explosion takes place that results in the formation of sodium chloride (white salt). The reaction flask must be left to cool for a considerable amount of time following the reaction before the salt can be observed.

What are the two indications that a chemical change has taken place between sodium and chlorine?

______

2.  List one piece of evidence you would expect to see that indicates that a chemical change has taken place in each of the following situations.

A.  A piece of raw steak that is left unrefrigerated for 4 days.

B.  Vinegar is accidentally spilled in a box of baking soda.