Reactions Unit Review

Test has 17 questions.

Mrs. Martin 2013-14

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)

Identify the following as an element, compound, homogenous mixture, or

heterogeneous mixture.• Zn

• Orange Juice (w/ pulp)

•Brass (Cu & Zn)

•H2O

•N2

Element Homogenous mixture

Element

CompoundHeterogeneous mixture

Balance the following equations!

• _______Al + _______ O2 _______Al2O3

• _______ PH3 _______ P4 + _______ H2

• ____ Mg(NO3)2 + ____NaOH ____Mg(OH)2 + ____NaNO3

3 24

4 6

22 11

1

List the diatomic elements

H2 O2 F2 N2 Cl2 I2 Br2

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 32 1

Determine if the picture shows an element, compound or mixture.

Compound Element Mixture

What type of reaction is this?2NaClO3 2NaCl + 3O2

Pb(NO3)2 + 2NaCl PbCl2 + 2NaNO3

3Fe + 4H2O Fe3O4 + 4H2

Decomposition

double displacement

single displacement

Balance the reaction

___ C4H10 + ___ O2 ___ CO2 + ___ H2O

__ FeCl3 + __ (NH4)2S __ Fe2S3 + __ NH4Cl

2 8 1013

32 1 6

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

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

What type of reaction is this?2Na + F2 2NaF

2C6H14(l) + 19O2(g) 14H2O(g) + 12CO2(g)

Synthesis

combustion

Which example shows a homogenous mixture? Which

shows a heterogeneous mixture?

• Can of nuts and bolts

• Bottle of Powerade

Heterogeneous

Homogeneous

Please make sure your packet is ready to be handed in tomorrow at the beginning of

class.