Complete the word equation:

💡 Think: what do metals do to acids? What gas is always released?

Complete the word equation:

💡 Metal oxides are bases. What do bases + acids always produce?

Complete the word equation:

💡 Carbonates are special — they release a gas you can test with limewater.

Complete the word equation:

💡 Hydroxides are alkalis — this is a classic neutralisation.

State the general rule for naming salts: what determines the salt's name?

💡 The salt's first part comes from the metal, the second part comes from the acid.

Write the word equation for magnesium reacting with sulfuric acid.

💡 Acid + Metal → ? Use the naming rule for sulfuric acid salts.

Write the word equation for zinc reacting with hydrochloric acid.

💡 Hydrochloric acid always forms chloride salts.

Write the word equation for copper(II) oxide reacting with nitric acid.

💡 Nitric acid forms nitrate salts. Metal oxides + acid → salt + water.

Write the word equation for calcium carbonate reacting with hydrochloric acid.

💡 Carbonate reactions always produce three products. What gas turns limewater milky?

Write the balanced symbol equation for the reaction between sodium hydroxide (NaOH) and hydrochloric acid (HCl).

💡 This is a neutralisation. One NaOH reacts with one HCl — already balanced!

State TWO observations when calcium carbonate (marble chips) is added to dilute hydrochloric acid.

💡 Watch the solid AND the solution. Use your senses — what do you see?

Describe how you would test the gas produced when zinc reacts with sulfuric acid. State the result for a positive test.

💡 This gas is famously explosive in air. What is the classic test?

State TWO observations when excess magnesium ribbon is added to dilute hydrochloric acid.

💡 Excess metal means the acid is fully used up. What happens to the metal and solution?

A student adds sodium carbonate solution to dilute sulfuric acid. State TWO observations.

💡 Carbonate + acid always releases a gas. What is it? What does the solution look like?

Explain why the rate of reaction between marble chips and hydrochloric acid slows down over time, even before the reaction stops completely.

💡 Think about what is being used up as the reaction progresses. How does this affect collisions?