8th period semester project

What are the four main types of chemical reactions?

• Solid, liquid, gas, plasma

• Synthesis, decomposition, single displacement, and double displacement

• Acidic, basic, neutral, alkaline

• Addition, subtraction, multiplication, division

What is the law of conservation of mass and how is it related to balancing chemical equations?

• Balancing chemical equations changes the mass of the reactants and products

• The law of conservation of mass states that mass can be created or destroyed in a chemical reaction

• Balancing chemical equations ensures that the same number of each type of atom is present on both sides of the equation, thus following the law of conservation of mass.

• Balancing chemical equations has no relation to the law of conservation of mass

Balance the chemical equation: H2 + O2 -> H2O

• H2O2 -> H2 + O2

• H2 + O2 -> H2O2

• 2H2O -> 2H2 + O2

• 2H2 + O2 -> 2H2O

What factors can affect the rate of a chemical reaction?

• Time of day

• Color of the reactants

• Distance from the equator

• Temperature, concentration, surface area, catalysts, and pressure

In a chemical reaction, what is a catalyst and how does it affect the reaction rate?

• A catalyst changes the products of the reaction, but not the reaction rate.

• A catalyst has no effect on the reaction rate.

• A catalyst increases the reaction rate by lowering the activation energy required for the reaction to occur.

• A catalyst decreases the reaction rate by increasing the activation energy required for the reaction to occur.

What is the difference between exothermic and endothermic reactions?

• Exothermic reactions release heat energy to the surroundings, while endothermic reactions absorb heat energy from the surroundings.

• Exothermic reactions absorb heat energy from the surroundings, while endothermic reactions release heat energy to the surroundings.

• Exothermic reactions release light energy to the surroundings, while endothermic reactions absorb heat energy from the surroundings.

• Exothermic reactions release cold energy to the surroundings, while endothermic reactions absorb heat energy from the surroundings.

Balance the chemical equation: Fe + O2 -> Fe2O3

• Fe + O2 -> Fe2O3

• Fe + O3 -> Fe2O3

• Fe2O2 -> Fe2O3

• FeO + O2 -> Fe2O3

What is a synthesis reaction and provide an example?

• The separation of a compound into its constituent elements

• An example of a synthesis reaction is the combination of hydrogen and oxygen to form water (2H2 + O2 -> 2H2O).

• The breakdown of water into hydrogen and oxygen

• The combination of carbon dioxide and water to form glucose

What is a decomposition reaction and provide an example?

• Example: The decomposition of salt into sodium and chlorine

• Example: The decomposition of sugar into carbon dioxide and water

• Example: The decomposition of hydrogen peroxide into water and oxygen gas.

• Example: The decomposition of iron into oxygen and hydrogen

What is a double displacement reaction and provide an example?

• The reaction between copper sulfate and zinc to form copper and zinc sulfate

• The reaction between iron and sulfur to form iron sulfide

• The reaction between water and sodium chloride to form sodium hydroxide and hydrochloric acid

• An example of a double displacement reaction is the reaction between silver nitrate (AgNO3) and sodium chloride (NaCl) to form silver chloride (AgCl) and sodium nitrate (NaNO3).