KS3 Mini-PracticalsNeutralisation

Neutralisation1. Put goggles on.

Neutralisation2. Pour about 20cm3 of hydrochloric acid (CARE: corrosive) into a small, clean beaker and label it A.1. Put goggles on.

Neutralisation3. Pour 10cm3 of sodium hydroxide solution (CARE: corrosive) into a small, clean beaker. Label this beaker B.2. Pour about 20cm3 of hydrochloric acid (CARE: corrosive) into a small, clean beaker and label it A.1. Put goggles on.

Neutralisation3. Pour 10cm3 of sodium hydroxide solution (CARE: corrosive) into a small, clean beaker. Label this beaker B.2. Pour about 20cm3 of hydrochloric acid (CARE: corrosive) into a small, clean beaker and label it A.1. Put goggles on.4. Add a few drops of Universal Indicator solution to beaker B.

Neutralisation3. Pour 10cm3 of sodium hydroxide solution (CARE: corrosive) into a small, clean beaker. Label this beaker B.2. Pour about 20cm3 of hydrochloric acid (CARE: corrosive) into a small, clean beaker and label it A.1. Put goggles on.5. Record the colour in the first row of your results table.4. Add a few drops of Universal Indicator solution to beaker B.

Neutralisation3. Pour 10cm3 of sodium hydroxide solution (CARE: corrosive) into a small, clean beaker. Label this beaker B.2. Pour about 20cm3 of hydrochloric acid (CARE: corrosive) into a small, clean beaker and label it A.1. Put goggles on.5. Record the colour in the first row of your results table.4. Add a few drops of Universal Indicator solution to beaker B.6. Using a plastic teat pipette, add 1cm3 of the acid in beaker A to the sodium hydroxide solution in beaker B. Record the colour in your results table.

Neutralisation3. Pour 10cm3 of sodium hydroxide solution (CARE: corrosive) into a small, clean beaker. Label this beaker B.2. Pour about 20cm3 of hydrochloric acid (CARE: corrosive) into a small, clean beaker and label it A.1. Put goggles on.5. Record the colour in the first row of your results table.4. Add a few drops of Universal Indicator solution to beaker B.6. Using a plastic teat pipette, add 1cm3 of the acid in beaker A to the sodium hydroxide solution in beaker B. Record the colour in your results table.7. Repeat step 6 until you’ve added a total of 15cm3 of acid. Be careful not to lose count!

Neutralisation3. Pour 10cm3 of sodium hydroxide solution (CARE: corrosive) into a small, clean beaker. Label this beaker B.2. Pour about 20cm3 of hydrochloric acid (CARE: corrosive) into a small, clean beaker and label it A.1. Put goggles on.5. Record the colour in the first row of your results table.4. Add a few drops of Universal Indicator solution to beaker B.You are adding ACID to ALKALI.6. Using a plastic teat pipette, add 1cm3 of the acid in beaker A to the sodium hydroxide solution in beaker B. Record the colour in your results table.7. Repeat step 6 until you’ve added a total of 15cm3 of acid. Be careful not to lose count!

Packing AwayReturn the bottles of acid, alkali and indicator.Rinse your beakers and teat pipettes and then put them in the washing-up tray.Put your goggles away tidily.Sit down when you’ve packed away.

Return the bottles of acid, alkali and indicator.

Rinse your beakers and teat pipettes and then put them in the washing-up tray.

Put your goggles away tidily.

Sit down when you’ve packed away.

Acids and Bases Quick Quiz1. Name one safety precaution you took to reduce the chance of getting acid in your eyes or on your skin. Wore goggles / safety spectacles 2. Which are generally more corrosive, acids or alkalis? alkalis 3. What was the name of the acid that you used in this experiment? hydrochloric acid 4. What was the name of the alkali that you used in this experiment? sodium hydroxide 5. What was the pH at the start of your experiment? 13 or 146. What is the word that means ‘when an acid is added to an alkali and cancels it out’? neutralize / neutralisation / neutral7. What colour does the universal indicator go when the pH is 7? green 8. If someone thought they had accidentally swallowed some acid, would it be a good idea to give them a drink of sodium hydroxide? no – the sodium hydroxide would cause further damage 9. One of the substances that you used in this experiment was a mixture of dyes. What was it? universal indicator 10. There is a more accurate way to measure pH than using universal indicator. What is it?pH meter

Acids and Bases Quick Quiz1. Name one safety precaution you took to reduce the chance of getting acid in your eyes or on your skin. Wore goggles / safety spectacles 2. Which are generally more corrosive, acids or alkalis? alkalis 3. What was the name of the acid that you used in this experiment? hydrochloric acid 4. What was the name of the alkali that you used in this experiment? sodium hydroxide 5. What was the pH at the start of your experiment? 13 or 146. What is the word that means ‘when an acid is added to an alkali and cancels it out’? neutralize / neutralisation / neutral7. What colour does the universal indicator go when the pH is 7? green 8. If someone thought they had accidentally swallowed some acid, would it be a good idea to give them a drink of sodium hydroxide? no – the sodium hydroxide would cause further damage 9. One of the substances that you used in this experiment was a mixture of dyes. What was it? universal indicator 10. There is a more accurate way to measure pH than using universal indicator. What is it?pH meter