C4—Chemical Changes

Question 1

What is a displacement reaction

Answer 1

Occurs when a MORE reactive metal displaced a LESS reactive metal from a compound

Question 2

What is a use of a displacement reaction

Answer 2

Obtain metals from their core

Question 3

What’s is OIL RIG

Answer 3

Oxidation
Is
Loss of electrons

Reduction
Is
Gain of electrons

Question 4

What’s the equation for alkali and acid

Answer 4

ACID+ALKALI———>SALT+WATER

Question 5

Why is an acid pH<7

Answer 5

Due to its H+ ions

Question 6

Why is an alkali pH>7

Answer 6

Due to its OH- Ions

Question 7

The pH scale is….

Answer 7

NON-LINEAR

Question 8

What gives you the indication of a pH by colour

Answer 8

Universal indicator

Question 9

A strong acid…..

Answer 9

DISSOCIATES more completely.

an example of a strong acid is Hydrochloric

Question 10

What are the Equipment for Titration

Answer 10

Burets
Pipette
Conical flask
Dilute Acid
Dilute Alkali
Retort stand

Question 11

What is Electrolysis

Answer 11

Involved passing an ELECTRICAL CURRENT through a substance to cause oxidation and reduction

Question 12

When can Electrolysis occur

Answer 12

Only happens if the Ions are free to mode.
Ionic compounds-only happen if molten metal are in solution