Colegio San PatricioReview 4th Period Exam

Name _______________________________________________ Date ____________________

Vocabulary words: Define the following terms.

1.- Chemical reaction:2.- Reactant3.- Product4.- Chemical equation5.- precipitate6.- catalyst7.- coefficient8.- subscript9.- Law of Conservation10.- endothermic reaction11.- exothermic reaction12.- neutralization reaction13.- acid14.- base15.- pH16.- pH scale

CHAPTER 3 CHEMICAL REACTIONS

1.- What is the basis of all chemical reaction?_______________________________________________________________________________________

2.- Identify the reactants and the products in the following equations:

a) NH3 N2 + H2 __________________________________________________________

b) Al + HCl AlCl3 + H2 ____________________________________________________________

3.- List 4 types of evidence of a chemical reaction.________________________________________________________________________________________

4.- Classify the following reactions.a) C4H8 + 6O2 ---> 4CO2 + 4H2Ob) 2KNO3 ---> 2KNO2 + O2

c) AgNO3 + NaCl ---> NaNO3 + AgCld) HCl + NaOH ---> H2O + NaCle) Cl2 + 2KBr ---> 2KCl + Br2

f) 2Mg + O2 ---> 2MgO

5.- Describe how the following factors affect the rate of a reaction:

a) Concentration __________________________________________________________________

b) Temperature ___________________________________________________________________

c) Surface area ___________________________________________________________________

d) Catalyst _______________________________________________________________________

6,. State the Law of Conservation of Mass.___________________________________________________________________________________

7.- How does a chemical equation show the conservation of mass?____________________________________________________________________________________

8.- Balance the following chemical equations:

______NH3 ______N2 + ______H2

______ C + ______ O2 ______ CO2

______ H2S + ______ O2 ______ H2O + ______ S

______ CH2O + ______ HCl ______ CH4O + ______ Cl2

9.- Why must equations be balanced? ____________________________________________________________________________________________________________________________________________________________________________

10.- How is a chemical equation balanced? ____________________________________________

11.- Symbols are used in chemical equations. Fill in the table with the corresponding symboldescription symbol description symbol

heatingWith, and (aq)

(s) Precipitateliquid catalystsolid

12.- Write a chemical equation:a) When lithium hydroxide is added to a solution of sulfuric acid, lithium sulfate and water are formed._____________________________________________________________________________________

b) When crystalline C6H12O6 is burned in oxygen, carbon dioxide and water vapor are formed._______________________________________________________________________________________

c) metallic sodium and water react to form a solution of sodium hydroxide and hydrogen gas_____________________________________________________________________________________

d) sodium bromide and chlorine gas react to produce sodium chloride solutions and liquid bromine____________________________________________________________________________________

13.- Review Nomenclature. Write the name or the formula.

Ionic or Covalent Name Formula

Sodium IodideMgCO3

Aluminum nitrate

Ba(OH)2

Dinitrogen tetrahydride

Cl2O7

Phosphorous pentabromide

BCl3

Lithium chlorate

KHSO4

Ammonium phosphate

CHAPTER 4 ACIDS, BASES AND SALTS

1.- Identify the following as acid, base or both:a) turn litmus paper blue ____________________b) sour taste ____________________d) conduct electricity when dissolved _______________e) react with metals to produce hydrogen gas ______________f) bitter taste ______________g) turn litmus paper red _____________h) react with carbonates to produce carbon dioxide gas ___________i) dissolve in water __________j) donate H ions _____________k) proton acceptors ____________

2.- Name and write the formula of 3 strong acids and 2 strong bases._____________________________________________________________________

3.- Name and write the formula of a weak acid and a weak base.____________________________________________________________________

4.- Distinguish between a strong acid and a weak acid.

___________________________________________________________________

4.- Fill in the table showing the colors of indicators in acids and bases

Indicator Color in acidic solutions Color in basic solutionslitmusphenolphtaleinRed cabbage juice

5.- What are the products of a neutralization reactions?_______________________________________________________________________________

6.- What is an antacid? Name examples.________________________________________________________________________________

7.- Match the reactants with the products of the following neutralization reactions.

_____NaOH + HCl a) H2O + Mg3(PO4)2

_____ HF + KOH b) NaCl + H2O

_____ H2SO4 + Ca(OH)2 c) KF + H2O

_____ Mg(OH)2 + H3PO4 d) H2O + CaSO4

8.- Identify the following as acidic, Basic or neutral

a) water pH = 7b) coffee pH = 4c) drain cleaner pH = 11.5d) H < OHe) H > OHf) H = OH