IB chemistry 11

Question 1

bakers, test tubes, watch glasses, and flasks are all examples of ________ glassware

Answer 1

qualitative

Question 2

graduated cylinders, volumetric flasks, pipettes, and burettes are all examples of _______ glassware

Answer 2

quantitative

Question 3

what does it mean for an instrument to be volumetric?

Answer 3

meant for measuring; high accuracy

Question 4

beakers

Answer 4

heat and mix chemicals, pour

Question 5

test tubes

Answer 5

store, heat, mix chemicals

Question 6

watch glasses

Answer 6

large surface afea for small liquids to evaporate/ crystalize

Question 7

flasks

Answer 7

mix contents without spilling; direct heating

Question 8

erlenmyer flask

Answer 8

to swirl / mix contents + add direct heat

Question 9

round bottom flask

Answer 9

to heat throughout, to distill

Question 10

volumetric (looks like bong)

Answer 10

mixing + extremely precise solutions , titrations, precision measurements

Question 11

graduated cylinder

Answer 11

semi precise, to deliver to another container

Question 12

burette

Answer 12

deliver precise liquids ; uses stopcock

Question 13

funnel

Answer 13

to dispense different powders/liquids

Question 14

zeros between sigs are

Answer 14

sig

Question 15

final zero after decimal

Answer 15

sig

Question 16

trailing zero in decimal

Answer 16

sig

Question 17

leading zero

Answer 17

not sig

Question 18

random error

Answer 18

unpredictable, random, cannot correct

Question 19

systematic error

Answer 19

correctable, consistently wrong - due to experiment/machine error

Question 20

absolute uncertainty

Answer 20

amount by which the measurement differs - final answer times decimal

Question 21

relative uncertainty

Answer 21

uncertainty/value

Question 22

percent uncertainty

Answer 22

uncertainty/value (100)

Question 23

percent error

Answer 23

experimental-actual/actual (100)

Question 24

absolute error

Answer 24

measured-accepted

Question 25

determining uncertainty

Answer 25

analogue : half the smallest digital: smallest increment

Question 26

adding/ sub

Answer 26

add uncertainties

Question 27

div / mult

Answer 27

calculate percent uncertainty of each, add together, multiply value by the decimal

Question 28

average

Answer 28

average uncertainties

Question 29

atom economy

Answer 29

desired product /total product

Question 30

green chemistry principles

Answer 30

1. Prevent waste 2. Maximize atom economy 3. less hazardous chemical syntheses 4. Design safer chemicals and products 5. Use safer solvents and reaction conditions 6. Increase energy efficiency 7. Use renewable feedstocks 8. reduce derivatives 9. Use catalysts 10. Design chemicals and products to degrade 11. Analyze in real time to prevent pollution 12. Minimize the potential for accidents

Question 31

higher atom economy is

Answer 31

preffered

Question 32

percent error> uncertainty

Answer 32

inaccurate