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310417-Nat 5 chemistry Unit 1 > Acids and alkali > Flashcards

Flashcards in Acids and alkali Deck (50)
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1

Formula Sodium Hydroxide

NaOH

2

Formula Magnesium Hydroxide

Mg(OH)2

3

What type of elements makes acid?

non-metals

4

Formula for hydrochloric acid

HCl

5

Formula Nitric acid

HNO3

6

Formula for sulfuric acid

H2SO4

7

Formula for Lithium Oxide

Li2O

8

Is Calcium oxide an acid, base or alkali?

alkali

9

what is the difference between an alkali and a base?

An alkali is a soluble base. (all alkali are bases but not all bases are alkali)

10

What soluble mean?

It can dissolve in water

11

What page in the databook can I find if a substance is soluble in water or not?

page 8

12

What would be the pH of water if we added carbon dioxide

acidic

13

What would be the pH of water if we added Silicon dioxide

neutral (silicon dioxide doesn't dissolve in water)

14

What would be the pH of water if we added Copper(II) oxide?

neutral, copper (II) oxide is insoluble in water.

15

What would be the pH of water if we added phosporous oxide

acidic

16

What would be the pH of water if we added potassium oxide

alkali

17

What is a solute?

a solid (eg. SALT)

18

What is a solvent ?

A liquid (eg: Water)

19

What is a solution?

When a solute disolve in a solvent (eg: sea water)

20

What does saturated mean?

Too much solute / when the solute stop dissolving in the solution

21

What is a precipitate

A soluble substance appears in solution

22

What is the pH of acids?

Less than 7

23

What is the pH of water/ neutral solution?

pH of exactly 7

24

What is the pH of a base/ alkali?

pH more than 7

25

What is the pH scale a measure of?

The concentration of hydrogen ions (H+) in any given solution

26

How can the pH be measured?

pH meter
pH indicator
pH paper

27

What is the name of OH-

Hydroxide ions

28

What is the name for H+

Hydrogen ions

29

In pure water what is the concentration of H+ and OH- ions?

Hydrogen ions = hydroxide ions

30

What ion does all acids contain?

H+ / Hydrogen ions