A saturated solution of sodium chloride (NaCl) at 80 ᴼC contains 40g of sodium chloride. If it is cooled to 10 ᴼC, then 35g can stay dissolved, what mass of blue copper sulfate crystals will form?

If 10g of salt is added to 50g of pure water, what is the mass of the solution?

Which of the following factors affect dissolving of sugar in water?

9. Which method of separation used to separate sugar in its dry state from sugar solution?

9. Which method of separation used to separate copper sulfate crystals from its solution?

9. Which method of separation used to separate petrol from crude oil?

9. Which method of separation used to separate pure water from its solution?

Complete the following sentence. The solid substance left on the filter paper during filtration is called _____________ .

Complete the following sentence. We can separate ethanol and water using fractional distillation because they have ________________.

Distillation involves; ___________________

followed by _____________________.

Identify the method of separating mixtures

Identify the method of separating mixtures

Identify the method of separating mixtures

Identify the method of separating mixtures

Identify the method of separating mixtures

Identify the method of separating mixtures

After 10 minutes, the banned food dye and some of the dyes from the food colourings had moved up the paper. Gary’s result (chromatogram) is shown above.

Which food colouring contains an insoluble dye?

After 10 minutes, the banned food dye and some of the dyes from the food colourings had moved up the paper. Gary’s result (chromatogram) is shown above.

Which food colouring contains a banned food dye?

After 10 minutes, the banned food dye and some of the dyes from the food colourings had moved up the paper. Gary’s result (chromatogram) is shown above.

Which food colouring does not contains a mixture of food dye?

Write the colour of the following indicators in acidic and basic medium.

Litmus In Acid

Write the colour of the following indicators in acidic and basic medium.

Litmus In Alkali

Write the colour of the following indicators in acidic and basic medium.

Phenolphthalein In Acid

Write the colour of the following indicators in acidic and basic medium.

Phenolphthalein In Alkali

Write the colour of the following indicators in acidic and basic medium.

Methyl Orange In Alkali

Some substances with their pH value are given above.

Which substance is the most acidic?

Some substances with their pH value are given above.

Which substance is neutral?

Some substances with their pH value are given above.

Which substance is slightly alkaline?

Universal indicator paper is used to show whether a solution is acidic, neutral or alkaline. Some solutions were tested with pH paper. The results are shown above.

Orange Juice is __________

Universal indicator paper is used to show whether a solution is acidic, neutral or alkaline. Some solutions were tested with pH paper. The results are shown above.

Egg White is __________

Universal indicator paper is used to show whether a solution is acidic, neutral or alkaline. Some solutions were tested with pH paper. The results are shown above.

Oven Cleaner is __________

Universal indicator paper is used to show whether a solution is acidic, neutral or alkaline. Some solutions were tested with pH paper. The results are shown above.

Milk is __________

Equal amounts of egg white and milk are mixed. What is the most likely pH of the mixture?

Bees and wasps are both insects which use a sting as part of their defense. The pH values of their stings are shown on the diagrams. Choose the correct statement about bee sting and wasp sting.

The table below shows five household substances and the pH of each substance. Arrange the substances in order of their pH, STARTING with the ONE WITH THE LOWEST.

Give the name of one substance which would neutralize wasp sting.

Name the substance used to neutralize the effect of indigestion caused by excess of stomach acid.

Which substance is used to reduce acidity of soil?

nitric acid+ lithium hydroxide→ ________________+___________________

Complete the following equation:• ____________

+ sodium carbonate → sodium chloride +_____________ +_____________

Complete the following equation:• ______________+_________________→ magnesium sulfate+ water

Complete the following equation:• hydrochloric acid + aluminium oxide → __________________+_________________

How do you identify the presence of carbon dioxide gas?

How do you identify the presence of hydrogen gas?

Which two chemicals can be used to make magnesium chloride?

Which two chemicals can be used to make copper sulfate ?

Which two chemicals can be used to make potassium nitrate?