Chemical Reactions
Balancing Equations
The Mole
Molarity
Acids/Bases
100

Name the Type of Reaction Below:

Na+ + Cl- --> NaCl

Synthesis Reaction

100

Balance the following chemical equation:

_K + _Cl2 --> _KCl

2 K + 1 Cl2 --> 2 KCl

100

How many molecules of NH3 are in 1 mole of NH3?

6.02 x 1023 molecules NH3 / 1 mole

100

What are the units for Molarity?

mol/L

100

A substance with a pH of 9.2 is a _______.

A substance with a pH of 6.7 is a _______.

pH>7 = Base

pH<7 = Acid

200

Name the Type of Reaction below:

H2O2 --> H2 + O2

Decomposition

200

Balance the following chemical equation:

_K + _S2 --> _K2S

4 K + 1 S2 --> 2 K2S

200

Determine the molar mass of NH4. You must have the correct units to get the points!

18.05 g/mol NH4

200

Determine the Molarity of solution when 0.7 moles HCl are added to 1.5 liters of solution. Must give proper units!

M = n/v

0.47 mol/L

200

The pH of a substance is 4.7. Determine the pOH.

pH + pOH = 14

pOH=9.3

300

Name the Type of Reaction below:

CuO + Zn --> ZnO + Cu

Single Replacement

300

Balance the following chemical equation:

_S2 + _O2 --> _SO3

1 S2 + 3 O2 --> 2 SO3

300

1 N2 + 3 H2 --> 2 NH3

Using the balanced equation above, determine how many moles of NH3 would be produced if 6 moles of H2 go into the reaction?

4 moles of NH3 produced

300

Determine the number of moles of solute when the Molarity is 0.55 M and the volume of solution is 3.2 L.

M= n/v

n = 1.76 moles

300

Determine the [H+] when the pH is 9.2.

pH=-log[H+]          [H+]=10-pH

[H+]=6.3 x 10-10 mol/L

400

Name the Type of Reaction below:

C3H8 + O2 --> CO2 + H2O

Combustion

400

Balance the following chemical equation:

_P6 + _O2 --> _PO3

1 P6 + 9 O2 --> 6 PO3

400

How many moles of H2 are in 7.9 grams of H2?

3.91 moles of H2

400

Determine M2 when:

M1=0.5 M

V1=0.7 L

V2=4.2 L

M1V1=M2V2

M2= 0.08 M

400

Determine the type of Acid/Base for the following reactant:

Mg(OH)2(aq)--> Mg + 2 OH-

Arrhenius Base

500

Name the Type of Reaction below:

MgCl2 + KBr --> KCl + MgBr2

Double Replacement

500

Balance the following chemical equation:

_C3H8 + _O2 --> _CO2 + _H2O

1 C3H8 + 5 O2 --> 3 CO2 + 4 H2O

500

1 N2 + 3 H2 --> 2 NH3

Using the balanced equation above, determine how many moles of NH3 would be produced if 0.22 moles of N2 go into the reaction?

0.44 moles of NH3 produced
500

Determine the Molarity when 30.0 grams of HF go into 2.4 L of solution. Answer must give proper units!

M=n/v

M=0.63 mol/L

500

Determine the type of acid and base for each of the reactants:

NH4+ + OH- --> NH3 + H2O

NH4+ - Bronsted-Lowry Acid

OH- - Bronsted-Lowry Base

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