C3.1 Introducing Chemical Reactions

Question 1

What kind of molecules are non-metals elements?

Answer 1

Diatomic molecules

Question 2

Name SHANC ions

Answer 2

Sulfate (SO4 2-), Hydroxide (OH -), Ammonium (NH4 +), Nitrate (NO3 -), Carbonate (CO3 2-)

Question 3

Define the law of conservation of mass

Answer 3

• Atoms cannot be created or destroyed by chemical reactions

- The same atoms are present at the start and end of a reaction

Question 4

What are spectator ions?

Answer 4

Ions that are in the reaction mixture, but do not take part in the reaction

Question 5

Define a mole

Answer 5

The amount of any substance that contains the same number of entities as there are atoms in 12g of carbon-12 atoms

Question 6

Give the equation for mass in terms of mass (grams)

Answer 6

mass (g) = molar mass (g/mol) x amount (mol)

Question 7

What is a limiting reactant?

Answer 7

Reactant that determines amount of product formed