Unit 6: Types of Chemical Reactions

Question 1

Name every point in the Ph scale

Answer 1

1-7: Acids, H+ ions production

7: Neutral

7-14: Bases, OH- ions production

Question 2

What happens to the Ph when an acid is added to a base

Answer 2

Bases lose their basicity when mixed with acids.
- WHY

Question 3

What two ways can Ph be measured?

Answer 3

Indicators

Ph probe - more accurate

Question 4

Acid

Answer 4

Releases H+ ions

Strong acid cause burn on skin.
Strong acids also destroy fabric.
Acids are electrolytes.

Question 5

Base

Answer 5

Releases OH- ions

They can conduct electricity.
Bases feel slippery or soapy.

Question 6

Acid + Base Reaction

Answer 6

Neutralisation Reaction. Results in a salt and water (because the H+ and OH+ make H20)

Question 7

Properties of Strong Acids

Answer 7

They fully ionise. Meaning they fully dissolve in a liquid or meaning that there are no bound electrons left, resulting in a bare nucleus.

This makes them better than a weak acid.

eg. HCL, HNO3