chemistry n stuff
暂无描述。系统推荐的高质量记忆内容，适合每天坚持背诵学习。
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What is decomposition?
A molecule breaking down into it’s components.
What is synthesis?
2 molecules combine to make a new one.
What is oxidation?
Reaction where oxygen is a reactant.
If H<2O<1 became 2H<2+O<2 what chemical change is that? (<2 means its small)
Decomposition.
If SO<2+H<2O becomes H<2SO<3 what chemical change is that? (‘
Synthesis.
If 4Fe+3O<2 becomes 2Fe<2O<3 what chemical change is that? (‘
Oxidation.
What is the symbol for density?
ρ
What is the symbol for mass?
m
What is the symbol for volume?
v
What unit is volume represented in?
cm cubed or millilitres
What unit is mass represented in?
grams
What unit is density represented in?
(grams/millilitre)
What are examples of physical changes?
Changes in shape, dissolution (dissolving), phase changes.
What are substance changes?
Condensation, evaporation, melting, freezing, sublimation and deposition.
What are characteristic properties?
Melting point, boiling point, density, electric conductivity and magnetism, solubility, reaction to indicators (pH stuff)
What are signs of a chemical change?
Smell or bubbles (gas is produced), change in colour, emission of heat or light, electricity produced, precipitation.
How do you calculate density?
ρ=m/v
How do you calculate volume?
v=m/ρ
How do you calculate mass?
m=ρxv
What’S a trick to help you find density, volume or mass?
The triangle (look it up in your notes)
When you use a blue litmus paper and it turns red, what is it?
Acid.
When you use a blue litmus paper and it stays blue, what is it?
Base.
When you use a blue litmus paper and it stays blue, what is it?
Neutral.
When you use a red litmus paper and it stays red, what is it?
Acid.