Awesome Acids Flashcards Preview

S2 Science > Awesome Acids > Flashcards

Flashcards in Awesome Acids Deck (29)
Loading flashcards...
1

What is the number range of the pH scale?

1-14

2

What does the pH scale measure?

The acidity or alkalinity of a substance

3

What is the pH range for acids?

Less than 7

4

What is the pH range for alkalis?

Greater than 7

5

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

False

6

Name 3 indicators used in the lab

pH paper universal indicator red cabbage indicator

7

What is the pH value for neutral solutions?

7

8

Name 2 ways of neutralising an acid

Dilution with water Reacting with an alkali

9

What are the 3 ways of extracting metals

Heating Heating with carbon Electrolysis

10

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

Rust

11

What are produced when a metal reacts with water?

An alkali and hydrogen

12

What are produced when a metal reacts with an acid?

A salt and hydrogen

13

What is the test for oxygen?

It relights a glowing splint

14

What is the test for hydrogen?

It burns with a pop

15

What are the products of neutralisation?

A salt plus water

16

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

A substance with a pH above 7

17

Name 2 metals that do not react with oxygen

Gold Silver Platinum

18

name 4 metals that react with water

Potassium Sodium Lithium Calcium

19

what is produced when metals react with oxygen?

A metal oxide

20

What is an ore?

A naturally occuring metal compound

21

What is displacement?

When a metal replaces another less reactive metal in a compound

22

What is the reactivity series?

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

23

Name 2 metals that do not react with acids

Copper Silver Gold Mercury Platinum

24

What is meant by neutralisation?

The pH value moves towards and reaches 7

25

How do you test for pH value?

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

26

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

Lower

27

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

Higher

28

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

A substance with a pH below 7

29

What are produced in a neutralisation reaction?

A salt plus water