Making copper chloride crystals:

Aki wanted to make some copper chloride crystals. He started by reacting copper oxide with hydrochloric acid. After filtering off the excess copper oxide, he put the blue copper chloride solution into an evaporating basin and evaporated off the water to obtain the crystals.

• To get the reaction to work, Aki had to heat the reactants. Draw a labelled diagram of the equipment he should use.

Making copper chloride crystals:

Aki wanted to make some copper chloride crystals. He started by reacting copper oxide with hydrochloric acid. After filtering off the excess copper oxide, he put the blue copper chloride solution into an evaporating basin and evaporated off the water to obtain the crystals.

• Describe safety precautions Aki should take whilst heating the mixture.

Making copper chloride crystals:

Aki wanted to make some copper chloride crystals. He started by reacting copper oxide with hydrochloric acid. After filtering off the excess copper oxide, he put the blue copper chloride solution into an evaporating basin and evaporated off the water to obtain the crystals.

• Draw the apparatus showing how Aki should evaporate off the water.

Making copper chloride crystals:

Aki wanted to make some copper chloride crystals. He started by reacting copper oxide with hydrochloric acid. After filtering off the excess copper oxide, he put the blue copper chloride solution into an evaporating basin and evaporated off the water to obtain the crystals.

• Read the description and underline the products.

Making copper chloride crystals:

Aki wanted to make some copper chloride crystals. He started by reacting copper oxide with hydrochloric acid. After filtering off the excess copper oxide, he put the blue copper chloride solution into an evaporating basin and evaporated off the water to obtain the crystals.

• Write a word reaction for the equation.

Making copper chloride crystals:

Aki wanted to make some copper chloride crystals. He started by reacting copper oxide with hydrochloric acid. After filtering off the excess copper oxide, he put the blue copper chloride solution into an evaporating basin and evaporated off the water to obtain the crystals.

• Aki was so pleased with the final crystals that he decided to make some more, but there was no copper oxide left. Name another chemical he could use.

Making copper chloride crystals:

Aki wanted to make some copper chloride crystals. He started by reacting copper oxide with hydrochloric acid. After filtering off the excess copper oxide, he put the blue copper chloride solution into an evaporating basin and evaporated off the water to obtain the crystals.

During the initial reaction between the new reactants, which was used in the place of copper oxide, Aki observed bubbles of gas being formed, which turned out to be carbon dioxide gas. Write a word equation for this reaction.

When a candle burns in the air, carbon dioxide and water are made. The mass of a candle before burning was $15.2 \mathrm{g}$. The mass of the candle after $5$ minutes of burning was $14.4 \mathrm{g}$.

Calculate the rate at which the candle burnt in $\mathrm{g}/\min$.

Explain why the mass decreased?