Download Review for SNC 2P Chemistry Unit(SPRING 2014)

Name: ______________________
SNC 2P Chemistry Unit Review
Part 1
Complete the following questions.
1. Explain the difference between the following pairs of terms. Give an example of each term.
a) physical property and chemical property
b) element and compound
c) metal and nonmetal
d) ionic compound and molecular compound
2. For each of the following replace the description with one word.
(a) A sample of matter that contains only one kind of atom. _________________________
WORD BANK:
(b) A characteristic of matter that involves the formation of a new substance ______________
decomposition
(c) A family of elements that includes sodium and potassium ___________________________
coefficient chemical
(d) The positively charged particle in an atom ______________________________
(e) An electrically charged atom ________________________
(f) A reaction that involves the combination of two elements._______________________
property
ion
alkali metals
pure substance
(g) The breaking apart of larger molecules into smaller molecules.____________________
proton
(h) The large number placed in front of a formula in a balanced equation. __________________
synthesis
3. The sentences below contain errors or are incomplete. Fix the sentence so that it is correct.
compounds
example: Elements and solutions are pure substances.
(a) An atom with more electrons than protons will be a positive ion.
(b) A molecular compound is held together with ionic bonds.
(c) The chloride ion is an example of a polyatomic ion.
(d) The chemical test for hydrogen gas of to use a glowing splint.
(e) A word equation contains words to represent compounds.
(f) The total mass of products equals the total mass of reactants unless a gas is produced.
(g) The products of the combustion of a hydrocarbon are carbon dioxide and oxygen.
4. Draw Bohr diagrams for the following elements.
(a) aluminum
(b) argon
(c) calcium
5. Draw the stable ion of each of the elements in question #4. Write the symbol and ionic charge of the
stable ion under each Bohr diagram.
6.
Identify the following compounds as either an acid or a base
a) H2SO4(aq) _________________
e) HF(aq) ______________
b) beryllium hydroxide _________________
f) Mg(OH)2 ______________
c) LiOH
g) chloric acid ________________
________________
d) phosphoric acid ______________
h) HCl (aq) ______________
7. Balance the following equations.
a) Ca
b) Mg
+
HBr 
+
N2
CaBr2
+

H2
c) Ba
+
H3PO4 
Ba3(PO4)2
+
H2
Mg3N2
8. Write a word equation and balanced chemical equation for the following reaction.
BaCl2 and Na2SO4 react to form BaSO4 and NaCl
word equation: _____________________________________________________________________
balanced chemical equation: _____________________________________________________
9. When methane (CH4) burns in oxygen gas (O2), it produces water (H2O) and carbon dioxide (CO2).
a) Write a skeleton equation for the above reaction.
___________________________________________________________________
b) Draw a sketch to represent each of the molecules in question 11a) . For example, methane might be a
black circle (carbon atom) attached to four white circles (hydrogen atoms).
c) Write the balanced chemical equation for the reaction in question 11a).
10. Predict the products in each of the following reactions.
a)
Li
+
b) Al2S3
Br2
+
 _______________________________________________
Be  _____________________________________________
c) Na3P  _______________________________________________
d) Ca(OH)2 + NaCl  _______________________________________________
e) K3N + Cl2  _______________________________________________
f) silver nitrate + copper (II) sulfide  _____________________________________________
g) Be3N2
+
KBr
 _______________________________________________
h)
ammonium phosphide + zinc hydroxide  ________________________________________
i)
aluminum chloride  _______________________________________________
j)
hydrogen sulfide +
fluorine
 _____________________________________________
11. A student performs a reaction in which magnesium is added to an acid solution and the liquid begins to
bubble and a gas is released into the room. The following results are obtained…
mass of reactants -
mass of magnesium = 3.4 g
mass of acid = 102.5 g
mass of liquid product = 105.6 g
Using the law of conservation of mass, calculate the mass of the gas that escaped into the room.
12. Using the pH scale below, answer the following questions.
a) What is the most acid solution on this pH scale? ____________
b) What solution has a neutral pH?
c) eggs are __________ times more _________ than detergent.
d) ammonia is ________ times more ________ than pop.
13. Name the following compounds
14. Write the formulas for the following ionic compounds.
(a) NaBr _________________________
(a) lithium phosphate _____________________
(b) MgI2 _______________________________
(b) calcium carbonate _____________________
(c) Ca(NO3)2 _____________________________
(c) silver iodide ________________________
(d) FeCl3 _______________________________
(d) aluminum bromide ____________________
(e) K2SO4 _________________________________
(e) lead (II) oxide _____________________
15. Write the name or formula for the following molecular compounds.
(a) phosphorus trichloride __________________________
(b) sulfur trioxide ________________________
(c) CBr4 _______________________________________________
(d) NO2 _______________________________________________
For question 16 to 22, circle the correct response.
16. What is the formula for the compound sodium sulfate?
(a) SSO4
(c) Na2SO4
(b) Na2S
(d) NaSO4
20. The set of elements containing only metals is:
(a) Zn, Li, Ca
(b) Sr, Al, Cl
(c) K, O, Ag
(d) P, S, Br
17. What is the name of the compound PCl3?
(a) phosphorus chloride
(c) phosphate carbide
(b) potassium carbide
(d) potassium carbide
21. What type of reaction occurs between magnesium
and hydrochloric acid (Mg + 2HCl  MgCl2 + H2)?
(a) synthesis
(c) single displacement
(b) decomposition
(d) double displacement
18. What type of reaction occurs between magnesium and
hydrochloric acid?
(a) synthesis
(c) double displacement
(b) single displacement
(d) combustion
22. An atom becomes a negatively charged ion when it:
(a) loses neutrons
(c) loses electrons
(b) gains electrons
(d) loses protons.
19. What type of reaction occurs between sodium and
chlorine?
(a) synthesis
(c) single displacement
(b) decomposition
(d) double displacement