chemistry

Question 1

what is the pH of acids?

Answer 1

less than 7

Question 2

what is the pH of alkalis?

Answer 2

more than 7

Question 3

What has a pH equal to 7?

Answer 3

pure water & neutral solution

Question 4

what HAPPENS in a neutralizing reaction?

Answer 4

the pH of the acid moves up towards 7. If an alkali is being used as the neutraliser its pH moves down towards 7.

Question 5

what is an EXAMPLE of neutralisation?

Answer 5

The reaction of hydrogen ions H+ (aq) to form water

Question 6

what IS a neutralisation reaction?

Answer 6

is the reaction of an acid with neutralisers such as alkalis, carbonates and metal oxides, which produces water and a salt.

Question 7

What happens to the pH of an ACID as it is neutralised?

Answer 7

The pH of an acid increases towards 7 in a neutralisation reaction.

Question 8

What happens to the pH of an ALKALI as it is neutralised?

Answer 8

The pH of an alkali decreases towards 7 in a neutralisation reaction.

Question 9

alkali + acid →

Answer 9

salt + water

Question 10

metal oxide + acid →

Answer 10

salt + water

Question 11

metal carbonate + acid →

Answer 11

salt + water + carbon dioxide

Question 12

hydrochloric →

Answer 12

chloride

Question 13

sulpheric →

Answer 13

sulphate

Question 14

nitric →

Answer 14

nitrate

Question 15

hydrochloric acid →

Answer 15

HCl

Question 16

nitric acid →

Answer 16

HNO3

Question 17

sulfuric acid →

Answer 17

H2 SO4

Question 18

phosphoric acid →

Answer 18

H3 PO4

Question 19

carnonic acid →

Answer 19

H2 CO3

Question 20

acetic acid →

Answer 20

HC2 H3 O2

Question 21

catalyst

Answer 21

increases the rate of a chemical reaction without being consumed by reaction

Question 22

exothermic

Answer 22

reaction that releases heat

Question 23

endothermic

Answer 23

absorbs heat

Question 24

precipitate

Answer 24

a solid formed from 2 solution

Question 25

solution

Answer 25

being dissolved

Question 26

solute

Answer 26

a dissovled substance

Question 27

insoluble

Answer 27

cannot be dissolved

Question 28

aqueous

Answer 28

dissolved in water

Question 29

reactant

Answer 29

starting material in a chemical reaction

Question 30

product

Answer 30

substance produced in a chemical reaction

Question 31

penta

Answer 31

5

Question 32

hexa

Answer 32

6

Question 33

hepta

Answer 33

7

Question 34

octa

Answer 34

8

Question 35

nona

Answer 35

9

Question 36

deca

Answer 36

10

Question 37

when an acid is dissovled in water we get a ...

Answer 37

acidic solution

Question 38

when a base is dissolved in water we get an...

Answer 38

alkaline and a alkaline solution

Question 39

indicators

Answer 39

substances that change color when added to alkaline or acidic solutions

Question 40

red & blue litmus is ____ in a ACIDIC solution

Answer 40

red

Question 41

red litmus paper is ____ in a NEUTRAL solution

Answer 41

red

Question 42

blue litmus paper is ______ in a NEUTRAL solution

Answer 42

blue

Question 43

red litmus paper is _______ in a ALKALINE solution

Answer 43

blue

Question 44

blue litmus paper is ______ in a ALKALINE solution

Answer 44

blue

Question 45

testing for gases O2

Answer 45

a glowing solint will reigninte in the presence of oxygen

Question 46

testing for gases H2

Answer 46

an immediate combustion takes place that you can hear

Question 47

testing for gases CO2

Answer 47

a lit splint will be extinguished

Question 48

sodium hydroxide - base

Answer 48

NaOH

Question 49

magnesium hydroxide - base

Answer 49

Mg(OH)2

Question 50

calcium hydroxide - base

Answer 50

Ca(OH)2

Question 51

ammonia

Answer 51

NH3

Question 52

sodium bicarbonate

Answer 52

NaHCO3

Question 53

when an acid is neutralized it forms a...

Answer 53

salt

Question 54

what do pH scales do?

Answer 54

used to measure acidity and alkalinity

Question 55

when acids are dissolved in water they form...

Answer 55

hydrogen ions

Question 56

when alkalines are dissolved in water they form...

Answer 56

hydroxide ions

Question 57

the closer to pH 0 you go, the more _____

Answer 57

acidic a solution is

Question 58

the closer to pH 14 you go, the more _______

Answer 58

alkaline a solution is