Starter think about these questions, you can jot ideas in the back of your book

1
Starter think about these questions, you can
jot ideas in the back of your book!

• What is an acid?
• What is an alkali?
• What is the difference between an base and an
  alkali?
• What does neutral mean?
• What is neutralisation?

2
Objectives

• To understand and be able to use key science
  words (acid, alkali, neutral, base and
  neutralisation).
• To know the general equation for neutralisation
  and be able to use this to generate specific
  equations.
• To be able to add details onto a data logged
  graph of neutralisation.

3
pH scale
4
Neutralisation

• Measure 20cm3 of hydrochloric acid into a beaker.
• Add a few drops of UI soln.
• Using a pipette, add sodium hydroxide to the
  acid.
• Observe.

5
Set up the data logger

• Log onto the computer.
• Take a temperature probe and put it into the USB
  drive.
• Take the pH probe and put it into the USB drive.
• Start, programmes, Vernier Software, LoggerPro
  3.4.2.

6
Neutralisation

• Measure 30ml of HCl into a beaker.
• Add a little squirt of UI soln.
• Put the probe into the ice.
• Start collecting the data.
• Add NaOH slowly until you have added 35ml.
• Stop collecting the data and autoscale.
• Print your graph.

7
Neutralisation

• Mark in red pen where the graph is acid.
• Mark in blue pen where the graph is basic.
• Make in green pen where neutralisation happens.
• Contrast the temperature and the pH graph what
  do they show you?

pH
Time
8
Which of these are acids?
9
Which is true?

• All alkalis have a pH lt7
• All alkalis have a pH gt7
• All alkalis have a pH 7

10
Which of these is neutral?
11
What is made is made when an acid and alkali
react?

• Water
• Salt and water
• Carbon dioxide, salt and water

12
Which of these is an alkali?
13
Which one of the following do alkalis and bases
not have in common?

• They are the opposites to acids
• They have a pH greater than 7
• They dissolve in water

14
Which is the formula for phosphoric acid?

• H3PO4
• H3PO4
• HPO4

15
What is the name of the salt produced when sodium
hydroxide reacts with nitric acid?

• Table salt
• Sodium chloride
• Sodium nitrate

16
What type of medicine is a cure for indigestion?

• Antacid
• Strong alkali
• Milk
• Neutral

17
Well done!
18
Try again!