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WorksheetsACIDS and BASES REVISION
Total questions: 21
Worksheet time: 10mins
Which of the following are properties of acids but not bases? Select all that apply.
Changes the color of an indicator
Sour taste
Reacts with metals to produce hydrogen gas
Feels slippery
Human blood has a pH between 7.35 and 7.45. Which of the following best describes human blood?
strongly acidic
slightly acidic
strongly basic
slightly basic
pH is the measure of the concentration of ______.
Acids
H+ ion
OH- ion
Base
If a solution is basic which ion will be more present?
H+
K+
OH-
H-
Stronger acids have a pH closer to...
7
14
0
9
Weaker bases have a pH closer to...
8
14
0
4
The word equation for an acid reacting with a base is
acid + metal → salt + carbon dioxide + water
acid + base → salt + water
acid + metal → salt + hydrogen
acid + metal → salt + water
Properties of bases are
feel soapy and neutralise acids
irritate your skin and react with metals to produce bubbles
taste sour and turn litmus red
have pH less than 7
Indigestion occurs when
stomach acid rises into the oesophagus, causing burns, because it is corrosive
the pH in the stomach is too high, so the stomach lining is damaged
there is not enough stomach acid to digest food sufficiently
stomach acid has reacted with carbonates to form carbon dioxide
When the pH of your pool is too high, algae and bacteria can flourish, what do you need to add to lower it
salt (e.g. sodium chloride)
chlorine
hydrochloric acid
sodium carbonate
An alkali is produced when
A salt dissolves in water
A base dissolves in water
An acid dissolves in water
An acid reacts with a base
Indicators
have a very high pH
change colour to show the pH of a substance
change colour in the presence of salts
have a very low pH
If you added universal indicator to vinegar, what colour would it turn
blue
green
yellow
red
