Science - Acids and Basesacidbase.jpg

Gap-Filling Quiz

Type the answers (or copy and paste them) into the blank boxes.
You may press the Hint button to get the next letter. However, you will lose marks each time that you receive a hint.
When you have selected all of your answers, click on the "Check" button.
Good luck!
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Acids are a group of chemicals that turn litmus . Everyday acids include sour , lemon juice and .
Bases are the chemical of acids. A solution of a turns red litmus blue. Everyday bases include washing soda, milk of , and cleaner.
A base that is soluble in water is called an alkali.
A substance is neither acidic nor basic. lt does not change the colour of .
Litmus is an because it has different colours in an acid and in a base.
The pH scale runs from to 14 and it measures the strength of an or basic solution. A neutral substance has a pH of . Acids have a pH of than 7 and the lower the value the the acid. Bases have a pH greater than 7 and the the value the stronger the base.
indicator is used to measure the pH of a solution because it has a different at each pH value.
A reaction will occur when an acid and base react to form a and water. An acid and a carbonate will react to form a salt, water and dioxide.