Reactions Unit Review

1
Reactions Unit Review

• Test has 17 questions.
• Mrs. Martin 2013-14

2
What are the four indicators of a chemical change?

• Significant Color change
• Formation of a precipitate
• Spontaneous change in energy (heat, light, sound)
• Formation of a gas (see bubbles or smell odor)

3
Identify the following as an element, compound,
homogenous mixture, or heterogeneous mixture.

• Zn
• Orange Juice (w/ pulp)

• Brass (Cu Zn)
• H2O
• N2

Homogenous mixture
Element
Compound
Heterogeneous mixture
Element
4
Balance the following equations!

• _______Al _______ O2 ? _______Al2O3
• _______ PH3 ? _______ P4 _______ H2
• ____ Mg(NO3)2 ____NaOH ? ____Mg(OH)2
  ____NaNO3

3
2
4
4
6
1
2
2
1
1
5
List the diatomic elements
H2 O2 F2 N2 Cl2 I2 Br2
6
Balance the reactions

• _____ Sb _____ O2 ?_____ Sb2O5
• _____ SO4 (g) ? _____ O2 (g) _____ SO2 (g)
• __ BaSO4 __ K3PO4 ? __ Ba3(PO4)2 __ K2SO4

4
5
2
1
1
1
3
3
2
1
7
Determine if the picture shows an element,
compound or mixture.
Compound Element Mixture
8
What type of reaction is this?

• 2NaClO3 ? 2NaCl 3O2
• Pb(NO3)2 2NaCl ? PbCl2 2NaNO3
• 3Fe 4H2O ? Fe3O4 4H2

Decomposition double displacement single
displacement
9
Balance the reaction

• ___ C4H10 ___ O2 ? ___ CO2 ___ H2O
• __ FeCl3 __ (NH4)2S ? __ Fe2S3 __ NH4Cl

2
8
10
13
3
2
1
6
10
What type of reaction

• starts with a carbon hydrogen compounds and
  always creates carbon dioxide and water?
  ____________________
• is like cutting in on a dancing couple when a
  single element replaces another element within a
  compound? ____________________
• creates only 1 product? ____________________

combustion
Single replacement
synthesis
11
What type of reaction

• has a single element displacing an element in a
  compound? ____________________
• starts with one reactant? _______________
• is like a square dance, with elements changing
  partners within compounds? ___________________

Single replacement
decomposition
Double replacement
12
What type of reaction is this?

• 2Na F2 ? 2NaF
• 2C6H14(l) 19O2(g) ? 14H2O(g) 12CO2(g)

Synthesis combustion
13
Which example shows a homogenous mixture? Which
shows a heterogeneous mixture?

• Can of nuts and bolts
• Bottle of Powerade

Heterogeneous Homogeneous
14
Please make sure your packet is ready to be
handed in tomorrow at the beginning of class.