N5 Chemistry Unit 1 Revision Questions (Acids & Bases)
acid + metal carbonate --> ________ + ___________ + ____________
salt + water + carbon dioxide
What is a salt?
An ionic compound where the hydrogen ion of an acid has been replaced by the positive ion of the neutraliser.
Why would copper oxide not affect the pH of water when mixed with it?
Because copper oxide is insoluble.
Why do acids and alkalis conduct electricity?
Because they are ionic solutions and the ions are free to carry charge.
Name the parent acid if the salt formed is sodium chloride.
Hydrochloric acid
What name do we call ions that are present during a reaction but do not take part in the overall reaction?
Spectator ions.
Name the parent acid if the salt formed is magnesium sulfate.
Sulfuric acid
What would happen to the pH of water when sodium oxide is mixed with it?
The pH would increase (an alkali has formed).
What is the general term for a neutraliser?
a base.
Vinegar is an example of a household...
acid
A pH of below 7 indicates an __________ solution.
acidic
Bleach is an example of a household...
alkali
A pH of above 7 indicates an __________ solution.
alkaline
In the presence of an alkali, pH paper or universal indicator will turn ...
blue/purple
When an acid is diluted with water the concentration of H+ ions will
decrease
Neutral solutions contain an ______ concentration of H+ ions compared to OH- ions.
equal
Acidic solutions contain a ______ concentration of H+ ions compared to OH- ions.
greater
In the presence of a neutral solution, pH paper or universal indicator will turn ...
green
Alkaline solutions contain a ______ concentration of H+ ions compared to OH- ions.
lower
If a soluble __________ oxide dissolves in water, an alkaline solution is formed
metal
A pH of 7 indicates a __________ solution.
neutral
If a soluble _____________ oxide dissolves in water, an acidic solution is formed.
non-metal
In the presence of an acid, pH paper or universal indicator will turn ...
red/orange
acid + alkali/base --> ________ + ___________
salt + water
What is the name of the experimental procedure that we can use to accurately determine the concentration of an acid?
titration
When an acid is diluted with water the pH will move
towards 7.
What concentration of 50cm3 sulfuric acid solution would be neutralized by 10cm3 of 2 moll-1 sodium hydroxide?
0.2 moll-1