Chemical reactions Jeopardy

Balancing and Classifying Equations

100

Balance:

___Li + ___O₂ –> ___Li₂O

Type?

_4_Li + ___O₂ –> _2_Li₂O

Synthesis

200

Balance:

___KClO₃ –> ___KCl + ___O₂

Type?

_2_KClO₃ –> _2_KCl + _3_O₂

Decomposition

300

Balance:

___NaOH + ___FeCl₃ –> ___NaCl + ___Fe(OH)₃

Type?

_3_NaOH + ___FeCl₃ –> _3_NaCl + ___Fe(OH)₃

Double displacement OR precipitation

400

Balance:

___AlBr₃ + ___Cl₂ –> ___AlCl₃ + ___Br₂

Type?

_2_AlBr₃ + _3_Cl₂ –> _2_AlCl₃ + _3_Br₂

Single displacement

500

Balance:

___C₄H₁₀ + ___O₂ –> ___CO₂ + ___H₂O

Type?

_2_C₄H₁₀ + _13_O₂ –> _8_CO₂ + _10_H₂O

Combustion

Precipitation

100

Definition of a precipitate

Solid formed by the reaction of two solutions

200

A compound which is ___________ will form a precipitate

Insoluble

300

Eliminated from the complete ionic equation to get the net ionic equation

Spectator ions

400

Does the following reaction form a precipitate? If so what is it?

Al₂(SO₄)₃ + 3BaCl₂ –> 3BaSO₄ + 2AlCL₃

Yes 

BaSO₄

500

Solutions of calcium nitrate and sodium sulfate are combined

Will a precipitate form? If so what is it?

Calcium sulfate (CaSO₄)

Reaction rate

100

For any chemical reaction to occur what three things must happen according to collision theory:

1. Particles must collide

2. Particles must collide with sufficient kinetic energy 

3. Particles must collide with the correct orientation 

200

How does increasing temperature affect reaction rate?

It increases the amount of collisions and the success of collisions as particles have more kinetic energy

300

Which factors increase the frequency of collisions?

Temperature, surface area and concentration

400

Why does the rate of a reaction usually decrease as the reaction continues?

Because the reactants are gradually used up as the reaction continues decreasing the amount of particles available to collide

500

A student carries out the same reaction three times.

• Experiment 1: large pieces of reactant at 20°C
• Experiment 2: powdered reactant at 20°C
• Experiment 3: powdered reactant at 40°C

Rank these experiments from slowest to fastest and explain why using collision theory

Experiment 1 (slowest), Experiment 2, Experiment 3 (fastest)

• Powder increases surface area, increasing collision frequency.
• Higher temperature gives particles more kinetic energy, increasing both collision frequency and the likelihood that collisions have enough energy to react.

Chemical formulas

100

Formula for sodium chloride

NaCl

200

Formula for carbon dioxide, water and nitrogen gas

CO₂  

H₂O

N₂

300

Formula for Alumium chloride

AlCl₃

400

Formula for Magnesium hydroxide

Mg(OH)₂

500

Formula for Iron(II) nitride

Fe₃N₂