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Question 1

What happens when a metal reacts with oxygen

Answer 1

Forms a metal oxide

Question 2

What is gaining oxygen called what happens to the electrons

Answer 2

An oxidation reaction

Electrons are lost

Question 3

What is losing oxygen called what happens to the electrons

Answer 3

A reduction reaction

Electrons are gained

Question 4

What happens when you react a metal with water

Answer 4

Produces a metal hydroxide (alkali) and hydrogen gas

Question 5

What happens when metals react.

What does their reactivity depend on

Answer 5

They lose electrons and form a positive ion.

K ——> K⁺ + e^-

Their ability to lose an electron to form a positive ion.

Question 6

Displacement rule

Answer 6

A more reactive element will displace a less reactive element from its compound

Question 7

What element do we use for most displacement reactions

Answer 7

Carbon - use lots of it

Question 8

What do acids produce in aqueous solutions

Answer 8

Hydrogen

Question 9

What are bases usually

Answer 9

Metal oxides

Metal hydroxides

Question 10

What are bases

Answer 10

Chemical which can neutralise acids producing a salt and water

Question 11

What are alkalis

Answer 11

Bases which are soluble in water

Question 12

What do alkalis produce in an aqueous solution

Answer 12

Hydroxide (OH)-

Question 13

How to determine pH

Answer 13

Universal indicator - changes colour

pH probe - electronically

Question 14

Neutralisation equation

Answer 14

H ⁺ + (OH)^- ——-> H₂O

Hydrogen from acid
Hydroxide from alkali

Question 15

The three common acids we use

Answer 15

Hydrochloric acid - HCl

Nitric acid - HNO₃

Sukfuric acid - H₂SO₄

Question 16

Complete the equation

Acid + Metal ——>

Answer 16

Acid + Metal ——> Salt + Hydrogen

Question 17

Hydrochloric acid ——>

Sulfuric acid ——>

Answer 17

Hydrochloric acid ——> - chloride

Sulfuric acid ——> - sulfate

Question 18

How do magnesium zinc and iron react with acids

Answer 18

Magnesium - rapidly ( a lotmore reactive than hydrogen, easier to displace)

Zinc - quite rapid

Iron - fairly slowly ( only just more reactive than hydrogen, harder to displace)

Question 19

Example equation of Magnesium reacting with Hydrochloric acid

Answer 19

Hydrochloric acid + Magnesium ——> Magnesium Chloride + Hydrogen

Question 20

complete the equation acid + metal hydroxide ——>

Answer 20

acid + metal hydroxide ——> salt + water

Question 21

complete the equation acid + metal oxide ——>

Answer 21

acid + metal oxide ——> salt + water

Question 22

complete the equation acid + metal carbonate ——>

Answer 22

acid + metal carbonate ——> salt + water + carbon dioxide

Question 23

Oxidation reaction half equation structure

Give an example using magnesium

Answer 23

Metal ——> metal ion + electrons

Magnesium ——> Mg²⁺ + 2e^-

Question 24

Reduction half equation structure

Use hydrogen as an example

Answer 24

2H⁺ + 2e^- ——> H₂