Topic 6 Chemical Reactions and Solutions

Identify the type of chemical reaction (a)  

• Synthesis
• Decomposition
• Single replacement
• Double replacement
• Combustion

In an endothermic reaction, heat is ...

• taken in or absorbed
• given out or released 

Which of the following shows the correct way to balance the chemical equation?
Fe + O₂ -> Fe₂O₃

• 4Fe + 3O₂ -> 2Fe₂O₃
• 2 Fe + 3O₂ -> Fe₂O₆
• 4 Fe + O₆ -> 2Fe₂O₃
• None of the options are correctly balanced.

What is a solute?

• The substance that does the dissolving in a solution.
• The substance that is dissolved into the solution.
• The mixing of different substances.
• The process in which neutral molecules lose or gain electrons

According to the law of conservation of mass, how does the amount of each element on the product side compare to each element on the reactant side?

• The amount of atoms on each side is equal

• The amount of atoms on the product side is greater

• The amount of atoms on the reactant side is greater

• Depends on the reaction

Which of the following describes a precipitate?

• a liquid forms when a block of metal is heated
• a solid forms when one liquid is poured into another
• a gas forms when a solid is placed in a liquid
• bubbles form when an acid is poured on a rock

Two reactants and one product

• decomposition

• single replacement

• synthesis

• combustion

One reactant into two or more products

• synthesis

• decomposition

• single replacement

• double replacement

What type of reaction equation is represented by the formula below?      

 AB + CD  →  AC + BD

• combustion

• single replacement

• double replacement

• synthesis

• decomposition

A temperature increase causes the particles ......

• to slow down

• move faster

• collide higher

• in the right order