Scholarship and Common Entrance word equations to learn for Chemistry and Biology Year 7
Word equations to remember and learn – fill in columns 3 and 4 for yourself
Topic area/ type of
reaction
Word Equation
Colour Changes (where appropriate). I
strongly urge you to think about this and
fill in. You will need to be active and look
through your notes and text book
hydrocarbons
(unit 3)
Oxidation
Hydrocarbon + oxygen
Carbon dioxide + water
(fuel)
Copper + oxygen
Copper Oxide
Magnesium + oxygen
Thermal
decomposition
There are many other
oxidation reactions
magnesium Oxide
Hydrated Copper Sulphate
Hydrated cobalt chloride
Copper Carbonate
Additional information e.g.
how you identified the gases
give off…. (Complete this for
yourself)
Anhydrous copper sulphate + water
anhydrous cobalt chloride + water
These are very important
These are very important
Copper Oxide + carbon dioxide
Potassium Manganate VII
Oxygen
Decomposition
Hydrogen Peroxide
Oxygen
Neutralisation
Acid + base/alkali
e.g.
Hydrochloric acid + sodium hydroxide
Salt + water
Sodium chloride + water
The type of salt you get
depends on….
Biology word equations:
Photosynthesis:
Carbon dioxide + water (and sunlight) glucose + oxygen
Respiration:
Glucose + oxygen carbon dioxide+ water (Energy released)
MAKE SURE YOU CAN REMEMBER HOW THE OXYGEN AND GLUCOSE GET INTO THE
BLOODSTREAM (VIA THE LUNGS DURING GAS EXCHANGE & DIGESTION OF
CARBOHYDRATES)
Indicators
Change colour to show acid or alkali
Litmus – Acid or Alkali
Universal Indicator – All pH’s
Acid
1
•
•
•
Base
Alkali
Neutral
2
Hydrochloric acid
Sulphuric Acid
Citric acid lemon juice
3
4
5
6
7
8
9
10 11 12 13 14
Acid + Alkali / Base salt + Water
(Nitric Acid + Sodium Hydroxide Sodium Nitrate + water)
•
•
•
Sodium Hydroxide
Calcium Hydroxide
Oven Cleaner
Acid + Alkali Salt + Water
Acid + Metal Salt + Hydrogen
Acid + Carbonate Salt + Carbon Dioxide
•
•
Pollutants such as Carbon Dioxide, Sulphur Dioxide and
oxides of nitrogen dissolve in rainwater
Kills trees, fish, erodes limestone
•
•
To neutralise acid soil – add lime (calcium hydroxide)
To neutralise stomach acid – add weak alkali such as milk of magnesia,
Rennies, or other antacids