Chemical Equations

Question 1

Chemical Equations

Answer 1

Word or symbol equations that represent chemical reactions.

• Changing sentences into word equations
• Changing word equations into symbol equations
• Writing ionic, metallic, and covalent chemical formulas
• Balancing chemical equations

Question 2

Types of Chemical Bonding

Answer 2

3 main types of chemical bonding:

Ionic bond: Forms between a metal and a non-metal (e.g. NaCl)

Covalent bond: Forms between two non-metals (e.g. CO2)

Metallic bond: Forms in a metallic substance (e.g. copper wire)

Question 3

Grouping Molecules

Answer 3

Group the following molecules into the 3 types of chemical bonding:

Ionic bonding: NaCl, MgO, CaO
Covalent bonding: CO2, H2O
Metallic bonding: Cu, K2O, C6H12O6, O2

REFER TO SLIDE 3

Question 4

Reactants

Answer 4

The old substances before the chemical reaction.

Question 4

In a chemical reaction…

Answer 4

New substances form and old ones disappear.

Question 5

Products

Answer 5

The new substances formed by the chemical reaction.

Question 6

What is a balanced chemical equation?

Answer 6

A balanced chemical equation accurately shows what is happening in a chemical reaction, ensuring the total number of each type of atom is the same on both the reactant and product sides.

Question 7

Law of Conservation of Mass

Answer 7

Atoms cannot be created or destroyed during a chemical reaction, they are only rearranged.

Question 8

Purpose of balancing chemical equations

Answer 8

To ensure the total mass of the reactants equals the total mass of the products, in accordance with the Law of Conservation of Mass.