1.2 Amount Of Substance

Question 1

Answer 1

Question 2

Answer 2

Question 3

Practical steps (method) for a titration

Answer 3

Question 4

3 ways to improve accuracy of titration

Answer 4

Question 5

Answer 5

Question 6

Describe method of heating in a cubicle

Answer 6

Question 7

Answer 7

Question 8

Volumetric pipette or measuring cylinder

Answer 8

Volumetric pipette because more accurate and smaller uncertainty

Question 9

Conical flask or beaker

Answer 9

Conical flask because it is easier to swirl the mixture without spilling the contents

Question 10

Why add distilled water during a titration to a conical flask

Answer 10

Question 11

Answer 11

Question 12

Answer 12

Question 13

Answer 13

Use larger mass of solid
So larger titre reading will be needed

Question 14

Answer 14

Question 15

Answer 15

Question 16

Answer 16

Question 17

Suggest a source of error using a burette

Answer 17

Air bubble

Question 18

Inside of conical flask rinsed with deionized water, why does this improve accuracy of titration

Answer 18

Returns reagents on side of mixture
Ensures all reagents are able to react

Question 19

Explain why adding water does not affect volume required in titration

Answer 19

Added water does not affect amount of moles

Question 20

Answer 20

Question 21

Answer 21

Question 22

Answer 22

Question 23

Answer 23

Question 24

Answer 24

Answer = 3.78g

Question 25

Completely ignore 3.1

Answer 25

Question 26

Ignore 6.1

Answer 26

Question 27

Answer 27

Question 28

Answer 28

Question 29

Answer 29

Question 30

Answer 30

A) incorrect -> Br^- is oxidised to Br2 B) Incorrect SO2 is formed, not sulfur (that's with iodide) C) Correct - it oxidises Br^- to Br2 and itself is reduced to SO2 D) Incorrect - H2S only formed when Sulfuric acid ismreduced further, e.g with iodide

Question 31

Answer 31

Question 32

Answer 32

Question 33

Answer 33

Question 34

Answer 34

Question 35

Answer 35

Question 36

Answer 36

Question 37

Answer 37

Question 38

Answer 38

Question 39

Answer 39

Question 40

Answer 40

Question 41

Answer 41

Question 42

Answer 42

Question 43

Answer 43

Question 44

Will tire reading increase or decrease if air bubble not removed

Answer 44

Increase

Question 45

What should you be careful of when using indicators

Answer 45

Question 46

How to reduce an uncertainty in a titration

Answer 46

Question 47

How to reduce uncertainty in measuring mass

Answer 47

Question 48

Answer 48

B

Question 49

Answer 49

Question 50

Answer 50

Question 51

Answer 51

Question 52

Answer 52

Question 53

Answer 53

Question 54

What to use to calculate atom economy and yield

Answer 54

Yield = moles Atom economy = Mr