acids and alkalis ✓

Question 1

what does an acid to go a hydrogen ?

Answer 1

they release a hydrogen

Question 2

what is the other way of saying that acids release hydrogens ?

Answer 2

they dissociate hydrogen ions

Question 3

what is the symbol for the acid hydrochloric acid ?

Answer 3

HCl

Question 4

what is the symbol for the acid sulphuric acid ?

Answer 4

H2SO4

Question 5

what is the symbol for the acid nitric acid ?

Answer 5

HNO3

Question 6

what is the symbol for the strong alkali sodium hydroxide ?

Answer 6

NaOH

Question 7

what is the symbol for the strong alkali calcium hydroxide ?

Answer 7

Ca(OH)2

Question 8

what is the symbol for the the weak alkali ammonia ?

Answer 8

NH3

Question 9

what is the use of litmus paper to distinguish between acid and alkali ?

Answer 9

litmus paper goes red when solution is an acid

litmus paper goes blue when solution is an alkali

Question 10

what is the use of phenolphthalein to distinguish between acid and alkali ?

Answer 10

phenolphthalein is colourless if acid

phenolphthalein goes red if alkali

Question 11

what is the use of methyl orange to distinguish between acid and alkali ?

Answer 11

methyl orange goes red if acid

methyl orange goes goes orange if alkali

Question 12

on the PH scale what colour is acid ?

Answer 12

red

Question 13

on the PH scale what colour is alkali ?

Answer 13

blue

Question 14

on the PH scale what colour is water ?

Answer 14

green

Question 15

what are the numbers of acid on the PH scale ?

Answer 15

0-6

Question 16

what are the numbers of alkali on the PH scale ?

Answer 16

8-14

Question 17

what is the number of water on the PH scale ?

Answer 17

7

Question 18

what is the Ph scale ?

Answer 18

a scale that tells you how alkali or acidic a substance is

Question 19

what is universal indicator ?

Answer 19

a liquid that goes different colours to show you how acidic or alkali a substance is

Question 20

what are acids a source of ?

Answer 20

H+ ions

Question 21

what are alkalis a source of ?

Answer 21

OH- ions

Question 22

what do acids do to alkalis ?

Answer 22

neutralise them

Question 23

what is the link between acids and protons ?

Answer 23

proton acceptors

Question 24

what is the link between bases and protons ?

Answer 24

proton donors

Question 25

what is the general equation for neutralisations ?

Answer 25

acid + base → salt + water

Question 26

what is the equation for hydrochloric acid with the alkali sodium hydroxide ?

Answer 26

hydrochloric acid + sodium hydroxide → sodium chloride + water

Question 27

what is the equation for sulphuric acid with the alkali sodium hydroxide ?

Answer 27

sulphuric acid + sodium hydroxide → sodium sulphate + water

Question 28

what is the equation for nitric acid with the alkali sodium hydroxide ?

Answer 28

nitric acid + sodium hydroxide → sodium nitrate + water

Question 29

what is the equation for hydrochloric acid with the metal lead ?

Answer 29

hydrochloric acid + lead → lead chloride + hydrogen

Question 30

what is the equation for sulphuric acid with the metal lead ?

Answer 30

sulphuric acid + lead → lead sulphate + hydrogen

Question 31

what is the equation for nitric acid with the metal lead ?

Answer 31

nitric acid + lead → lead nitrate + hydrogen

Question 32

what is the equation for hydrochloric acid with the metal oxide copper oxide ?

Answer 32

hydrochloric acid + copper oxide → copper chloride + water

Question 33

what is the equation for sulphuric acid with the metal oxide copper oxide ?

Answer 33

sulphuric acid + copper oxide → copper sulphate + water

Question 34

what is the equation for nitric acid with the metal oxide copper oxide ?

Answer 34

nitric acid + copper oxide → copper nitrate + water

Question 35

what is the equation for hydrochloric acid with the metal carbonate calcium carbonate ?

Answer 35

hydrochloric acid + calcium carbonate → calcium chloride + water + carbon dioxide

Question 36

what is the equation for sulphuric acid with the metal carbonate calcium carbonate ?

Answer 36

sulphuric acid + calcium carbonate → calcium sulphate + water + carbon dioxide

Question 37

what is the equation for nitric acid with the metal carbonate calcium carbonate ?

Answer 37

nitric acid + calcium carbonate → calcium nitrate + water + carbon dioxide

Question 38

what is the equation for hydrochloric acid with ammonia ?

Answer 38

hydrochloric acid + ammonia →

Question 39

what is the equation for sulphuric acid with ammonia ?

Answer 39

sulphuric acid + ammonia →

Question 40

what is the equation for nitric acid with ammonia ?

Answer 40

nitric acid + ammonia →

Question 41

what is the general equation for ammonia when it helps make salts ?

Answer 41

acid + ammonia → ammonium with salt

Question 42

what is the equation for hydrochloric acid with ammonia ?

Answer 42

hydrochloric acid + ammonia → ammonium chloride

Question 43

what is the equation for sulphuric acid with ammonia ?

Answer 43

sulphuric acid + ammonia → ammonium sulphate

Question 44

what is the equation for nitric acid with ammonia ?

Answer 44

nitric acid + ammonia → ammonium nitrate

Question 45

what do metal oxides act as ?

Answer 45

a base

Question 46

what do metal hydroxides act as ?

Answer 46

a base

Question 47

what does ammonia act as ?

Answer 47

a base

Question 48

what are alkalis ?

Answer 48

soluble bases

Question 49

what is an experiment to prepare a pure dry sample of a solute salt from an acid and alkali ?

Answer 49

- add acid to alkali - react - filter out impurities - heat, evaporate to form a concentration solution - leave salt to dry

Question 50

what is an experiment to produce a pure dry sample of an insoluble salt starting from two soluble reactants ?

Answer 50

- add metal to acid - mix and stir - react - filter (salt is in filter paper) - rinse salt still in filter paper with distilled water - leave to dry

Question 51

what is an experiment to prepare pure dry hydrates copper sulphate crystals starting from copper oxide ?

Answer 51

- add copper oxide to warm sulphuric acid → makes copper sulphate - evaporate off some of the water and leave solution to crystallise - get blue hydrate copper sulphate crystals - filter off - let dry