C1 - Chemical Equations

Question 1

What is one way to show a chemical reaction? (1)

Answer 1

A word equation

(even though it is not as quick as using chemical symbols)

Question 2

What are reactants?

Answer 2

A substance that takes part in and undergoes change during a reaction

Question 3

What are products?

Answer 3

The result formed after a chemical reaction

Question 4

What is another way to show a chemical reaction? (2)

Answer 4

Symbol equations

(shorthand only showing the symbols or formulas of the reactants and products)

Question 5

What do symbol equations always need to be?

Answer 5

They always need to be balanced on BOTH sides

Question 6

How do you balance equations?

Answer 6

By putting numbers in front of the formulas where needed

(For example H2SO4 + NaOH = Na2SO4 + H2O is not balanced so you put numbers in front of the formulas where needed

H2SO4 + 2NaOH = Na2SO4 + 2H2O (Now the whole chemical equation is balanced))

Question 7

Balance Fe + Cl2 = FeCl3

Answer 7

2Fe + 3Cl2 = 2FeCl3