Chemistry Flashcards
Alkalis have a pH in the range…
7.1 to above 14
A substance with a pH of 5 is…
A weak acid
An example of a lab alkali is…
An example of a lab acids are…
Hydrochloric acid and sulphuric acid.
The relationship between an acid and an alkali is that they are….
Opposites
Common house hold alkalis are…
Baking powder and indigestion tablets.
The pH of a substance is tested with…
Universal indicator or pH paper.
pH 7 shows that a substance is…
Neutral
Any substance which can neutralise an acid I a…
Base
To test for carbon dioxide gas…
Use lime water which should go cloudy/chalky.
To test for oxygen gas…
Use a glowing splint which should relight.
To test for hydrogen gas…
Use a burning splint which should give a squeaky POP!
Big crystals are formed from…
Slow evaporation
Effervescence means…
Bubbling and fizzing.
Soil types include…
Sandy, loamy and clay.
