Chemical reactions

Question 1

Give examples of some everyday chemical reactions

Answer 1

-Cake baking and rising
-digesting food
-a bicycle rusting

Question 2

what are the indicators of a chemical reaction

Answer 2

1) a colour change
2) An energy change ( sound, heat, light)
3) A solid is formed ( precipitate)

Question 3

what is always made in a chemical reaction

Answer 3

a new substance/compound

Question 4

what change always happens in a chemical reaction

Answer 4

In a chemical reaction there is always an ENERGY CHANGE. Sometimes energy is released, other times it is absorbed.

Question 5

We heated iron and sulphur together to make iron sulphide. The reactants in this experiment were?

Answer 5

Iron and sulfur

Question 6

We heated iron and sulphur together to make iron
sulphide.

The product in this reaction was?

Answer 6

Iron sulfide

Question 7

We heated iron and sulphur together to make iron
sulphide.
the Word Equation for this is?

Answer 7

iron + sulfur arrow iron sulphide

Question 8

how do you format a word equation?

Answer 8

reactant + reactant arrow product

Question 9

how NOT to format a word equation

Answer 9

reactant + reactant = product
NEVER USE EQUALS