Lesson 2: Ionic equations

Question 1

What do ionic equations show?

Answer 1

• Ionic equations show the ions involved in a reaction.
  They only show particles that have changed

Question 2

What are “spectator ions”?

Answer 2

• Spectator ions are on both sides of an equation.
  They haven’t changed

Question 3

What are the steps to writing an ionic equation?

Answer 3

1.) Balance the equation
2.) Split ionic compounds into ions.
3.) Cancel out spectator ions
4.) Write net equation

Question 4

When are ionic compounds formed ?

Answer 4

When non - metals react with metals.

Question 5

What are polyatomic ions?

Answer 5

• Ions that consist of more than 1 type of atom.

Question 6

What are monoatomic ions?

Answer 6

• Ions that consist of one type of atom.

Question 7

How do particles change in chemical reactions?

Answer 7

• Particles change by gaining/ losing electrons.

Question 8

What is the ionic formula for “hydroxide?”

Answer 8

OH⁻

Question 9

What is the ionic formula for “nitrate”?

Answer 9

NO₃⁻

Question 10

What is the ionic formula for “ammonium”?

Answer 10

NH₄⁺

Question 11

What is the ionic formula for “sulphate”?

Answer 11

SO₄²⁻

Question 12

What is the ionic formula for “carbonate”?

Answer 12

CO₃²⁻

Question 13

What is the ionic formula for “phosphate”?

Answer 13

PO₄³⁻

Question 14

What 2 things make an ionic equation balanced?

Answer 14

• Same overall charge
• Number of atoms on each side

Question 15

How is the “net ionic equation” achieved?

Answer 15

• You must cancel out spectator ions.

Question 16

Which ionic compounds are split into their ions?

Answer 16

• Soluble ionic compounds.
• State symbol (aq)

Question 17

What type of ionic compounds do you split into their ions?

Answer 17

• You split AQUEOUS ionic compounds into their ions.

Question 18

Which substance here is a precipitate?
NaCl (aq) + AgNO₃(aq) —> AgCl (s) + NaNO₃ (aq)
How do you know?

Answer 18

• AgCl (s) because it is a solid product.

Question 19

Why does potassium iodide solution conduct electricity? (1)

Answer 19

• It conatains ions which can move.