Matter
Name the three states of matter
Solid, Liquid and gas
What is matter?
Anything that has mass and volume
What are the starting substances in a chemical reaction called?
Reactants
What do we call the substances formed in a chemical reaction?
Products
Balance the following chemical equation:
H2 + O2 ---> H2O2
1 H2 + 1 O2 ---> 1 H2O2
Name the change from gas to liquid
Condensation
Name the two main categories matter can be classified in to.
Pure substances and mixtures
Is the evaporation of water a physical or chemical change?
Physical change
Is cooking food a physical or chemical change?
Chemical change
Is burning paper a physical or chemical change?
Chemical Change
Which state of matter has a fixed shape?
Solids
Which separation method do you use to separate alcohol from water?
Using Distillation
Balance the following chemical equation:
KClO3 = KCl + O2
2 KClO3 = 2 KCl + 3 O2
What is conserved in a chemical reaction?
The mass
Balance the following chemical equation:
FeS2 = Fe3S4 + S2
3 FeS2 = Fe3S4 + S2
Name the change from solid to gas
Sublimation
What is the name of the element under carbon?
Silicon
What type of chemical reaction produces light, heat, carbon dioxide and water?
Combustion or burn something
Balance the following chemical equation:
Fe + O2 = Fe2O3
4 Fe + 3 O2 = 2 Fe2O3
What reaction causes iron to rust?
Oxidation
Calculate the density of a substance with a volume of 0.5m3 and 150kg of mass
300 kg/m3
What is the difference between element and compound?
Element is one type of particle and compound is two or more elements joined up
Why is the mass of a rusty iron nail greater than a new one?
the reaction with oxygen in the air that adds mass
What happens to atoms during a chemical reaction?
They rearrange but do not disappear or appear
What gas is released when vinegar reacts with baking soda (bicarbonate of soda)?
Carbon Dioxide