Y9 C2 Recall Questions

What is always made when a chemical reaction takes place?​

• New Reactants

• New Products

• Nothing

What are the products of a metal reacting with water?​

• A Gas

• Salt + water

• Metal hydroxide + Hydrogen

What are the names for the chemicals on the left and right of the arrow in a chemical reaction?​​

• Left: Reactants

  Right: Products

• Left: Products

  Right: Reactants

• Left: Ingredients

  Right: Products

Why would one metal displace another?​​

• If it is more powerful

• If it is liquid

• If it is more reactive

What is an exothermic reaction?​

• One that gives chemical energy out to the surroundings

• One that gives thermal energy out to the surroundings

• One that takes in thermal energy from the surroundings

Give an example of an endothermic reaction​

• A fire burning, respiration

• Ice freezing

• Photosynthesis, Thermal decomposition, ice pack​

If a reaction gave off gas as one of its products, how could we measure the rate of reaction?​

• Time taken for gas to stop being produced (no more bubbling/fizzing) or volume of gas collected in a given time.

• Measure it with a ruler.

• Collect the gas

Write the symbol equation for the reaction of magnesium with hydrochloric acid.​ Name the products

• Mg + 2HCl -> MgCl₂ + H₂​ ​

  ( Magnesium chloride and hydrogen)

• Mg + Acid -> MgCL + H₂​ ​

  ( Magnesium chloride and hydrogen)

• Mg + 2HCl = MgCl₂ + H₂​ ​

  ( Magnesium chloride and hydrogen)

What are the products formed when an acid and a metal carbonate react​?​

• Salt + Hydrogen Gas

• Salt + Water

• Salt, water and carbon dioxide​​

Why are group 1 metals called alkali metals?​

• They were discovered by Mr Alkali

• They make alkali hydroxides when reacted with water

• They make alkali hydroxides when they react with oxygen.