Chem T4 Test Reveiw

Determine the reaction type: 4Si + S₈ → 4SiS₂

• Double displacement

• Single Displacement

• Synthesis

• Decomposition

3KOH + H₃PO₄ → K₃PO₄ + 3H₂O

• Acid/Base

• Double Displacement

• Single Displacement

• Combusion

C₁₀H₈ + 12O₂ → 10CO₂ + 4H₂O

• Synthesis

• Double Displacement

• Decomposition

• Combustion

Balance the equation: __Al + __HCl → __H₂ + __AlCl₃

• 2, 6, 3, 2

• 4, 12, 3, 4

• balanced

• 6, 3, 2, 3

Balance the equation: __P₄ + __O₂ → __P₂O₃

• balanced

• 1, 2, 3

• 2, 1, 3

• 1, 3, 2

Balance the equation: __C₂H₆ + __O₂ → __CO₂ + __H₂O

• 2, 7, 4, 6

• 1, 5, 2, 3

• 1, 2, 1, 2

• 1, 3, 1, 2

Which of the following is an example of a chemical change?

• rusting of a bicycle
• painting a house
• washing a dog
• tearing up a newspaper

Which of the following are chemical reactions? (you can choose more than one answer)

• sugar dissolving in water

• water turning into steam

• burning wood

• mixing baking soda and vinegar

• tearing paper

Some chemical reactions require a substance called a catalyst. The purpose of a catalyst is

• to warm up the reaction

• to speed up the reaction

• to create more reactants

• to stop the reaction

Which of the following are examples of an Exothermic Reaction?

• Cooking an egg

• Plants making sugar through photosynthesis

• Burning a match

• Dynamite exploding