Download Chem 313 Chapter 10 Test Review

Chapter 10 Chem review.
1. Balance the following equations
A. _4_C7H9 +_37_ O2 ---> energy +_28_ CO2 + _18_H2O
B. _2__Na2O2 + _2_H2O ---> _4_NaOH + ___ O2
C.__P4O10 + _6_H2O + energy---> _4_H3PO4
D. __FeCl3 + 3_NH4OH -->__Fe(OH)3 +_3_NH4Cl
2.List the reactants in 1C.
P4O10, H2O
3.List the products in 1D.
Fe(OH)3, NH4Cl
4.Which equation in #1 is Endothermic? __C_ or Exothermic? _A_
5. How does a balanced chemical equation demonstrate the Law of Conservation of Mass?
Mass is neither created nor destroyed in a chemical reaction. Because all atoms have a characteristic mass,
equal numbers of each atom must be represented on each side of the equation so that the mass consumed
equals the mass produced.
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 __Double Replacement___
BaCl 2 (aq)  Li2 SO4 (aq)  BaSO4 (s)  2LiCl (aq)
b. Solid silver oxide breaks down to form silver metal and oxygen gas. Type __Decomposition__
2 Ag 2O(s)  4 Ag(s)  O2 ( g )
7. Determine the physical states of the following ionic compounds.
Lithium phosphate _aq___
8.
MgCO3 __s__
Barium iodide __aq__
(NH4)2S__aq___
Predict the products of the following chemical reactions, balance the reaction and determine its type.
a. _2_C2H2 +_5_ O2 --->
4CO2 + 2H20
Type ____Combustion__
b. ___PbCl2 +__Mg --> MgCl2 + Pb
Type ___Single Replacement____
c. _2_Na + ___ Cl2 -->
Type ____Synthesis_______
d.
2NaCl
___ Ca(OH ) 2  2 KCN  Ca(CN)2 + 2 KOH
e. _2_FeI3  2Fe +
3I2
Type
__Double Replacement______
Type ___Decomposition________
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 --> NR
___ZnSO4
+ __2_K --> K2SO4 +
Zn
In each of the following pairs, which element will replace the other in a reaction?
a.
b.
c.
d.
tin and sodium
fluorine and iodine
lead and silver
copper and nickel
Predict the products of the following single replacement reactions if they occur
3F2  2 FeI 3  2FeF3 + 3I2
___ Cu  ___ H 2 SO4  NR
___ Br2  ___ AlCl3  NR
An aqueous solution of nickel (II) sulfate is mixed with aqueous sodium hydroxide. Will a
visible reaction occur? (formation of a precipitate)
A.
B.
C.
D.
No, solid nickel (II) hydroxide is soluble in water
No, solid sodium sulfate is soluble in water
Yes, solid sodium sulfate will precipitate out of solution
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?
______Change in color________
______Change in Temperature_______
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. (Production of a gas or odor)
B.
Vinegar is accidentally spilled in a box of baking soda. (Production of a gas)