Do now!
Can you stick the
summary sheets in your
books?
Write in your planners that
we will be having a
Digestion test (8A) next
Friday 23rd October.
Acids and alkalis
Acids and alkalis
Can you stick the target sheet in
your book and complete the first
column?
Acids and alkalis
Can you then stick the word sheet
in??
Acid tastes
Acid tastes
Acid comes from the latin word acer,
which means sharp. Acids are sharp
tasting! (“Tangy”)
Litmus
We can test if a substance is an acid by
using a chemical called Litmus.
Litmus turns red in acid
Indicator
Because Litmus can help us find out if a
substance is an acid, it is called an
indicator.
Testing different substances
You are now going to test different
substances with Litmus to see if any of
them are acids.
Table of results
Substance
vinegar
milk
Apple juice
Coke
Sodium hydroxide NaOH
Hydrochloric acid HCl
Sulphuric acid H2SO4
Nitric acid HNO3
Prediction Colour with Result
Litmus
Litmus
Turns red in acid
Turns blue in alkali
Litmus
Turns red in acid
Turns blue in alkali
Can you copy this
please?
Questions!
Can you read page
56 of your book and
then answer
questions 1 and 2?