Chemistry

Compare by the way of Investigation the abilities of different indigestion remedies to neutralise excess stomach acid

Indicator in Acids and Bases shows the pH of a solution.

Litmus goes Red when the pH < 7 and Blue when the pH > 7

Methyl Orange Indicator,

Pink when the pH is 4.4 - 7

& Orange when the pH is > 7

So it is Orange in the Base

and it turns Pink when Neutral! ! !

For a fair test

All Measurements must be the same!!!

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How do YOU make YOUR REMEDY mix ???

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Where are you going to put the REMEDY MIX ???

CONICAL FLASK!

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hOW DO you MEASURE THE VOLUME OF

1/ REMEDY ??

5ml

a plastic dropper

2/ WATER ??

20ml - 60ml ??

Measuring cylinder

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How much Indicator do I add??

What do I need the indicator for ??

To see the colour change!

Drop by drop until I can see the colour!!!

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Now add the Acid!

From the Burette!

What level does the acid start at ??

0 zero, the acid must be at the top!!!

Drop by drop add the acid

until the colour changes, swirling as you go!!

Take a note of the volume of acid that you used!

& Start again!

Do each one 3 times, wash out the conical flask !

For more top tips on how to fill out the booklet

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