Chemical reactions & Mathematical Concepts - Intro to Back to Basics (1.6)

Question 1

What state is carbon at room temp?

Answer 1

Solid

Question 2

What state is sulphur at room temp?

Answer 2

Solid

Question 3

What state is iodine at room temp?

Answer 3

Solid

Question 4

What state is bromine at room temp?

Answer 4

Liquid

Question 5

What state is mercury at room temp?

Answer 5

Liquid

Question 6

Give examples of aqueous solutions

Answer 6

• Any ionic substance dissolved in water
• Ionic products in aqueous solutions
• Most lab acids

Question 7

What is a precipitation reaction?

Answer 7

When two solutions come together to make a solid

Question 8

What is a displacement reaction?

Answer 8

When the metal in a salt is replaced with a more reactive metal

Question 9

What is complete combustion?

Answer 9

A substance burns in oxygen, making CO2 & water

Question 10

What is incomplete combustion?

Answer 10

A substance burns in oxygen, forming CO & water

Question 11

Define acid

Answer 11

A substance that contains H+ ions

Question 12

Define base

Answer 12

A substance that reacts with an acid in a neutralisation reaction

Question 13

Define alkali

Answer 13

A specific type of base that dissolves in water

Question 14

What is a neutralisation reaction?

Answer 14

When an acid (H+) reacts with an alkali (OH-) to make water

Question 15

Acid + metal –>

Answer 15

salt + hydrogen

Question 16

Acid + metal carbonates –>

Answer 16

salt + CO2 + water

Question 17

How do you test for whether a substance is acid or alkali?

Answer 17

Universal indicator

Question 18

How do you test for the presence of hydrogen gas?

Answer 18

Squeaky pop test

Question 19

How do you test for the presence of oxygen?

Answer 19

Oxygen relights a glowing splint

Question 20

How do you test for the presence of CO2?

Answer 20

Turn limewater milky