C1 - topic 3 - acids

Question 1

what part of the body produces hydrochloric acid?

Answer 1

stomach

Question 2

what do indegestion tablets do?

Answer 2

neutralise the acids in the stomach (hydrochloric)

Question 3

why does your stomach produce hydrochloric acid?

Answer 3

to fight against bacteria and to break down food

Question 4

what type of chemical can we use to neutralise acids?

Answer 4

alkalis

Question 5

what is the reaction called when an acid becomes neutral by using an alkali?

Answer 5

neutralisation

Question 6

what colour and pH is neutral when using universal indicator?

Answer 6

Green and pH7

Question 7

a hydrochloric acid produces what salts?

Answer 7

chloride

Question 8

A nitric acid produces what salt?

Answer 8

nitrate

Question 9

a sulfuric acid produces what salts?

Answer 9

sulfate

Question 10

what does electrolysis mean?

Answer 10

breaking something down using electricity

Question 11

what is the chemical test for hydrogen?

Answer 11

squeaky pop

Question 12

what is the chemical test for chlorine?

Answer 12

bleaching litmus paper

Question 13

what is the chemical test for oxygen?

Answer 13

relight a glowing splint

Question 14

what substance has a pH less than 7?

Answer 14

acid

Question 15

what substance has a pH greater than 7?

Answer 15

a base

Question 16

what base dissolves in water?

Answer 16

an alkali

Question 17

on the pH scale what colour is an alkali?

Answer 17

purple/blue

Question 18

what colour is neutral on the pH scale?

Answer 18

green

Question 19

what colour is an acid on the pH scale?

Answer 19

orange/red

Question 20

what does the pH scale show colour wise?

Answer 20

the colours you get when you add universal indicator to an acid or an alkali?

Question 21

what is made during a neutralisation reaction between acids and bases?

Answer 21

salts

Question 22

is salt and water an acid, alkali or neutral?

Answer 22

neutral

Question 23

what is the equation of a neutralisation reaction?

Answer 23

acid + base = salt and water

Question 24

what are two uses of salt?

Answer 24

used in fertilisers e.g. ammonium nitrate and ammonium phosphate
used in fireworks as colouring agents e.g. calcium chloride (orange) and copper chloride (blue/green)

Question 25

why do chemical containers have symbols on them to tell you what the dangers are?

Answer 25

because they can be bad for you or dangerous in some way?

Question 26

what is an advantage of understanding the hazard symbols?

Answer 26

it means that you'll be able to use suitable safe-working procedures in the lab

Question 27

what does the stomach produce?

Answer 27

hydrochloric acid

Question 28

are acids useful or harmful in the human body?

Answer 28

useful

Question 29

why does the stomach produce hydrochloric acid?

Answer 29

to help with digestion as the enzymes will break down food in the stomach and they work best in an acidic environment

Question 30

having acid in the stomach helps to do what?

Answer 30

kill bacteria

Question 31

what is indigestion caused by?

Answer 31

too much hydrochloric acid in the stomach

Question 32

what do indigestion tablets contain?

Answer 32

based such as calcium carbonate, which neutralises the excess acid

Question 33

what are metal oxides and metal hydroxides often?

Answer 33

bases

Question 34

metal oxides and metal hydroxides are often bases so what does this mean?

Answer 34

they can be neutralised with acids to form a salt and water

Question 35

acid + metal oxide = ?

Answer 35

salt + water

Question 36

acid + metal hydroxide = ?

Answer 36

salt + water

Question 37

what decides the salt?

Answer 37

the combination of metal and acid

Question 38

hydrochloric acid + copper oxide = ?

Answer 38

copper chloride + water

Question 39

hydrochloric acid + sodium hydroxide = ?

Answer 39

sodium chloride + water

Question 40

sulfuric acid + zinc oxide = ?

Answer 40

zinc sulfate + water

Question 41

sulfuric acid + calcium hydroxide = ?

Answer 41

calcium sulfate

Question 42

nitric acid + magnesium oxide = ?

Answer 42

magnesium nitrate + water

Question 43

nitric acid + potassium hydroxide = ?

Answer 43

potassium nitrate + water

Question 44

what physical state is a oxide?

Answer 44

solid

Question 45

what physical state is a hydroxide?

Answer 45

aq

Question 46

what physical state is a acid?

Answer 46

aq

Question 47

what physical state is water?

Answer 47

l - liquid

Question 48

what do metal carbonates give?

Answer 48

salt + water + Carbon dioxide

Question 49

acid + metal carbonate = ?

Answer 49

salt + water + Carbon dioxide

Question 50

what do carbonates give off when they neutralise acids?

Answer 50

Carbon dioxide

Question 51

what is the symbol for hydrochloric acid?

Answer 51

HCL

Question 52

what is the symbol for sodium carbonate?

Answer 52

Na2CO3

Question 53

what is the symbol for sodium chloride?

Answer 53

NaCL

Question 54

what is the sodium for carbonate?

Answer 54

CO3

Question 55

what is the symbol for sodium?

Answer 55

Na2

Question 56

what is electrolysis?

Answer 56

the breaking down of a compound using electrical energy

Question 57

during electrolysis the electricity used come from a ?

Answer 57

direct current (d.c)

Question 58

what is an example of a d.c?

Answer 58

a battery

Question 59

what does the battery require to conduct the electricity?

Answer 59

a liquid

Question 60

what is the liquid called that allow electricity to be conducted?

Answer 60

electrolytes

Question 61

how is the electricity applied to the electrolyte?

Answer 61

two electrodes

Question 62

what does the electrolyte contain?

Answer 62

the compound which is broken down into its component parts

Question 63

how are the component parts released?

Answer 63

as atoms or molecules - often as a gas

Question 64

what would happen if a d.c current is applies to the electrolyte?

Answer 64

the hydrochloric acid would decompose into its two component parts

Question 65

what are the two component parts of hydrochloric acid?

Answer 65

hydrogen gas and chlorine gas

Question 66

what is the symbol for hydrogen gas?

Answer 66

H2

Question 67

what is the symbol for chlorine gas?

Answer 67

CL2

Question 68

how can the faded bubbling through the solution be collected?

Answer 68

at the electrodes

Question 69

how can you test for chlorine gas?

Answer 69

chlorine bleached litmus paper, turning it white

Question 70

what is the test of hydrogen gas?

Answer 70

hydrogen makes a "squeaky pop" with a lighted splint

Question 71

where does the "squeaky pop" come from whilst testing for hydrogen?

Answer 71

the hydrogen burning with the oxygen in the air to form H2O