unit 2b

Question 1

rate of reaction factors

Answer 1

temperature
concentration- or pressure for gases
catalyst
surface area

Question 2

ROR factors only affect

Answer 2

the time not amount of product

Question 3

measuring rates of reactions

Answer 3

reactants used up or products formed (better)

Question 4

ROH

Answer 4

product formed / time

Question 5

methods for rates of reaction

Answer 5

precipitation- precipitate forms
change in mass (gas given off)
volume of gas

Question 6

ror precipitate

Answer 6

initial solution clear
precipitate forms
dot disappears
subjective

Question 7

ror change in mass

Answer 7

gas given off
scales measured at intervals 
faster the reading drops, the faster the reaction 
easy to plot graphs 
most accurate 
gas is released

Question 8

ror volume of gas

Answer 8

gas syringe

quite accurate

Question 9

HCL + marble chips

Answer 9

gas syringe

effect of surface area

Question 10

Mg + dilute HCL

Answer 10

concentration

mass

Question 11

sodium + hcl

Answer 11

cloudy precipitate

Question 12

decomposition of hydrogen peroxide

Answer 12

effect of catalysts

Question 13

higher concentration

Answer 13

likely

Question 14

higher temp

Answer 14

more often

closer to activation energy- fast enough collisions

Question 15

higher surface area

Answer 15

more area

frequent

Question 16

catalyst

Answer 16

speeds up reaction

gives reacting particles a surface to stick to

Question 17

catalyst pros

Answer 17

more in less time
lower temp needed
never get used up

Question 18

catalyst cons

Answer 18

specific to reactions
expensive
can be poisoned by impurities- reaction mixture needs to be clean