D. Awesome Acids

Question 1

What is the number range of the pH scale?

Answer 1

0-14

Question 2

What does the pH scale measure?

Answer 2

The acidity or alkalinity of a substance

Question 3

What is the pH range for acids?

Answer 3

Less than 7

Question 4

What is the pH range for alkalis?

Answer 4

Greater than 7

Question 5

True or false? The pH scale can only measure in whole numbers.

Answer 5

False

Question 6

Name 3 indicators used in the lab

Answer 6

pH paper universal indicator red cabbage indicator

Question 7

What is the pH value for neutral solutions?

Answer 7

7

Question 8

Name 2 ways of neutralising an acid

Answer 8

Dilution with water Reacting with an alkali

Question 9

What are the 3 ways of extracting metals

Answer 9

Heating Heating with carbon Electrolysis

Question 10

What do we call the substance formed when iron reacts with oxygen and water?

Answer 10

Rust

Question 11

What are produced when a metal reacts with water?

Answer 11

An alkali and hydrogen

Question 12

What are produced when a metal reacts with an acid?

Answer 12

A salt and hydrogen

Question 13

What is the test for oxygen?

Answer 13

It relights a glowing splint

Question 14

What is the test for hydrogen?

Answer 14

It burns with a pop

Question 15

What are the products of neutralisation?

Answer 15

A salt plus water

Question 16

What type of substance would you take if you had acid indigestion?

Answer 16

A substance with a pH above 7

Question 17

Name 2 metals that do not react with oxygen

Answer 17

Gold Silver Platinum

Question 18

name 4 metals that react with water

Answer 18

Potassium Sodium Lithium Calcium

Question 19

what is produced when metals react with oxygen?

Answer 19

A metal oxide

Question 20

What is an ore?

Answer 20

A naturally occuring metal compound

Question 21

What is displacement?

Answer 21

When a metal replaces another less reactive metal in a compound

Question 22

What is the reactivity series?

Answer 22

A table of metals with most reactive at top and least reactive at bottom

Question 23

Name 2 metals that do not react with acids

Answer 23

Copper Silver Gold Mercury Platinum

Question 24

What is meant by neutralisation?

Answer 24

The pH value moves towards and reaches 7

Question 25

How do you test for pH value?

Answer 25

1. Add some suitable indicator to substance 2. Match colour to appropriate colour chart 3. Read off pH value matching that colour

Question 26

Do strong acids have a higher or lower pH than weak acids?

Answer 26

Lower

Question 27

Do strong alkalis have a higher or lower pH than weak alkalis?

Answer 27

Higher

Question 28

What type of substance would be used to treat an alkaline wasp sting?

Answer 28

A substance with a pH below 7

Question 29

What are produced in a neutralisation reaction?

Answer 29

A salt plus water