Y10 Making copper(II) sulfate crystals

What colour does the solution turn when copper oxide powder is added to sulfuric acid?

• Blue

• Green

• Clear

• black

How do you remove the water to make saturated copper sulfate solution?

• Filter the solution

• Gently heat to evaporate some of the water

• Distillation

• Tip some down the sink

Salts that are made with sulfuric acid are called ______________.

• chlorides
• sulfates
• nitrates
• carbonates

How do you separate an excess insoluble reactant from a solution?

• Filtration

• Precipitation

• Crystalisation

• Evaporation

When we heat the copper sulfate solution in the evaporating basin over a water bath we are making

• copper sulfate crystals

• a dilute solution

• a saturated solution

• a neutralised solution

Why do we add copper oxide powder in excess?

• to make extra strong crystals

• to make sure all the base is used up

• to ensure all acid is reacted

• no special reason, it's just the way we do this

Copper oxide powder is

• an insoluble base

• a soluble base

• an insoluble alkali

• an alkali

Identify the equipment shown here:

• crucible
• evaporating dish
• mortar and pestle
• bowl

If you were asked to accurately measure 40 cm³ of acid, which equipment would be suitable?

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Name this lab apparatus:

• plastic cone

• filter funnel

• inverted cone

• conical funnel