ALPHONSA
JOMY
ELAIN
Activity
3
1
Chapter 4
4.6.2
Planning: How well do antacids work?
Antacids (indigestion remedies) help to relieve acid indigestion by
neutralising stomach
acid. Do some antacids really work faster than
others like the adverts
say? You are going to plan an investigation
to
compare how quickly
different brands of antacid work.
Equipment
four beakers
• measuring cylinder
• Universal Indicator solution
a stirring rod
Planning
• a solution of stomach acid'
Universal Indicator chart
a stopwatch
⚫ four different brands of antacid
Write down the question you are trying to answer in your investigation.
2 Read the information on the antacid packets.
How could you test the
antacids in the lab instead
of using stomach acid? Discuss your ideas
.
How will you know when the antacid has
neutralised the acid? How will
you measure how long the neutralisation
takes? Discuss your ideas.
4 Work out whether anything other than the type
of antacid may affect
your results. You must work out a
way to keep these variables the
same to make it a fair test.
567
Make a list of the equipment you will need
Decide how you will set up your equipment. Draw a labelled diagram
Think about how to make your results reliable. How many readings will
you take? Write down your decisions.
usplan. Make sure it says.