The UnFair Game

Types of Chemical reactions

111

What type of reaction is this...

2H₂O ---> 2H₂ + O₂ 

Decomposition 

222

What type of reaction is this...

2Mg + O₂ ---> 2MgO

Synthesis 

333

Draw a single replacement equation using 2Al + 3CuCl₂ as your reactants.

2Al + 3CuCl₂ ---> 3Cu + 2AlCl₃

444

Name the cation and anion of the double replacement equation of LiCl + NaOH and write your new products. 

Li+Na= cation

Cl+OH= anion

NaCl + LiOH

555

What is always produced in a combustion reaction?

CO₂ and H₂O

Balancing

111

Balance the equation using smallest mole coefficients...

__ NaBr + __ Ca(OH)₂ ---> __ CaBr₂ + __ Na
(OH)

_2_ NaBr + _1_ Ca(OH)₂ ---> _1_ CaBr₂ + _2_ Na
(OH)

222

Balance the following equation using smallest mole coefficients...

__ Pb + __ H₃PO₄ ---> __ Pb₃(PO₄)₂ + __ H₂

_3_ Pb + _2_ H₃PO₄ ---> _1_ Pb₃(PO₄)₂ + _3_ H₂

333

What do the coefficients in a balanced chemical reaction equation indicate about the substances in the equation?

mole ratios 

444

Balance the following equation using smallest mole coefficient...

__ C₅H₁₂ + __ O₂ ---> __ CO₂ + __ H₂O + heat

_1_ C₅H₁₂ + _8_ O₂ ---> _5_ CO₂ + _6_ H₂O + heat

555

What could you use to help you balance equations?

REP Chart

% Composition by Mass

111

Name the formula using to calculate percent composition by mass.

Mass of part/Mass by whole  X  100

222

Calculate the percent composition of hydrogen in water (H₂O).

11.2 % Hydrogen 

333

Find the percent by mass of carbon in CO₂.

27.29% Carbon 

444

Find the percent by mass of oxygen in H₂O

88.8% Oxygen 

555

Calculate the percent composition by mass of copper in (CuSO₄ * 5H₂0)

25.4 % Copper 

Stoichiometry

111

Given  the equation:

2H₂+O₂→2H₂O

How many moles of H₂O are produced from 5.0 moles of H₂?

5.0 moles of H₂0

222

How many grams are in a 0.28 sample of FeCl₂?

35.504 grams FeCl₂

333

How many moles of potassium chloride (KCl) are in 25.0 g of potassium chloride. 

2KClO₃ ---> 2KCl + 3O₂

0.34 m KCl

444

*How many grams of nitrogen is produced when 18.5 grams of hydrogen reacts with nitrogen monoxide? 

2H₂ + 2NO ---> 2H₂O + N₂

129.6 g Nitrogen 

(you need to do two conversions because you first get mass of H₂ and then you need to get the mass of N)

555

Given:

N₂ +3H₂→2NH₃

How many grams of NH₃ are produced from 6.0 g of H₂?

34.0 grams of NH₃

Chemical Formulas

111

What are the three different types of Chemical Formulas?

-Molecular

- Structural 

-Empirical 

222

What is the empirical formula of C₅H₁₀?

CH₂

333

What are possible molecular formulas for CH₃?

-C₂H₆

_-C₆H₁₈

_-C₃H₉

444

The empirical formula for a compound is CH₂ and its molecular formula is 42 g/mole. What is the molecular formula for this molecule?

C₃H₆ 

555

The empirical formula for a compound is CH₂O and its molecular mass is 180 g/mole. What is the molecular formula for this molecule?

C₆H₁₂O₆