(Eve's) 8C4 - Chemical Reactions

Question 1

what is the word equation for magnesium oxide?

Answer 1

magnesium + oxygen -> magnesium oxide.

Question 2

what would be the products of magnesium and hydrochloric acid mixed together?

Answer 2

hydrogen and magnesium chloride.

Question 3

what is the difference between a mixture and a compound?

Answer 3

a mixture is when two or more elements come together but they do not mix into one substance. a compound is when two or more elements come together to make one substance.

Question 4

what does exothermic mean?

Answer 4

it gives heat out.

Question 5

what does endothermic mean?

Answer 5

it takes heat in.

Question 6

how do you know a chemical reaction has happened?

Answer 6

• colour change.
• gas being produced.
• temperature change (up or down)
• new substance formed

Question 7

what is the name of the things you mix together to make a product?

Answer 7

reactants.

Question 8

what is meant by independant, dependant and control in an experiment?

Answer 8

independant- what we will change.
dependant- what we will measure.
control- what we will keep the same.

Question 9

is magnesium oxide a element, mixture or compound?

Answer 9

it is a compound.

Question 10

what is an element?

Answer 10

it is a pure substance with only one type of atom.