Double Displacement & Neutralization Reactions Fit

Question 1

Double Displacement Pattern

Answer 1

• 2 compounds displaces to create two new compound
• 2 cations displace with each other
• No activity series is used

Question 2

Evidence of Double Displacement

Answer 2

• If a solid precipitate forms
• If a gas forms
• If water forms through neutralization
• If these things do not form, the double displacement did not occur

Question 3

Precipitate

Answer 3

• When ionic compound dissolves in water, they they separate into ions
• However some ionic compounds do not dissolve in water and are insoluble and are called precipitate
• 2 aqueous solutions must for a precipitate for reaction to occur
• If there is no precipitate, products will be unchanged as nothing is combining

Question 4

How do we know if a precipitate forms??

Answer 4

We use the Solubility Table!

Question 5

Spectator ions

Answer 5

Ions that remain unchanged in the reactant side of reaction

Question 6

Direct gas production

Answer 6

• Sulfide compound + Acid → Hydrogen sulfide gas, H2S
• Hydride (e.g. LiH) + water → Hydrogen gas, H2
• Single and double displacement reaction: treat water as H(OH)
• Not with synthesis

Question 7

Indirect gas production

Answer 7

• Formation of H2CO3 in reactants→ CO2 (g) + H2O (l)
• Formation of H2SO3→ SO2 (g) + H2O (l)
• Formation of NH4OH → NH3 (g) + H2O (l)
• All these compounds are unstable and breaks down

Question 8

Neutralization

Answer 8

• Acid + Base → Water + Ionic Salt
• Do not form precipitate
• Call it neutralization NOT double displacement

Question 9

Neutralization with a Carbonate

Answer 9

• Carbonate + acid → carbonic acid + compound
• Carbonate and sulfide neutralizes acids by being unstable

Question 10

Neutralization with a Bicarbonate

Answer 10

Acid
* Carbonic acid is formed, breaking apart and neutralizing acid
Base
* Hydrogen and OH combine to form water (l) and base, neutralizing base

Question 11

Reaction Conditions

Answer 11

• Catalysts help to speed up reactions
• Heat, pressure, electricity, MnO
• Not reactants in the equations
• Written above the arrow