CI

Question 1

What is the equation for the iodine clock experiment?

Answer 1

H2O2 + 2H+ + 2I- –> 2H2O + I2
Colourless –> coloured
+Sodium thiosulfate and iodine

Question 2

What is the reaction for sodium thiosulfate with iodine?

Answer 2

2S2O3 2- + I2 –> 2I- + S4O6 2-

Question 3

What is the rate equation?

Answer 3

Rate = k[A]a[B]b
Conc = constant

Question 4

Rate graphs/order

Answer 4

Conc/time graphs - rate/conc graphs

Straight down = straight across (0 order)
Curve down = increase proportionately (1st order)
Curve down = curve up (2nd order)

Question 5

What is the Arrhenius equation?

Answer 5

k = Ae ^ (-Ea/RT)
A = arrhenius constant
e = exponential

Question 6

What happens to Ea/k as temp increases?

Answer 6

Smaller
K increases

Question 7

Arrhenius equation with removed exponential

Answer 7

ln k = ln A - Ea/RT

Question 8

What does a graph of ln k against 1/T tell us?

Answer 8

Gradient = -Ea/R

Question 9

Arrhenius in the form y = mx + c

Answer 9

lnk = -Ea/RT + ln A

Question 10

How to find A from ln A

Answer 10

e ^ ln A

Question 11

What is the rate determining step?

Answer 11

Slowest step in multi-step reaction
Multi-step can be sped up by adding catalyst/increasing step

Question 12

N2O systematic name

Answer 12

Nitrous oxide

Question 13

NO systematic name

Answer 13

Nitric oxide

Question 14

Test for nitrate ions

Answer 14

Heat with Devarda’s alloy to form ammonia gas
Ssmelly + bleaches

Question 15

How to measure initial rate using half life graph

Answer 15

Slope/gradient of tangent at origin

Question 16

What is the difference between by-product and co-product?

Answer 16

By = side reaction
Co = main reaction

Question 17

How do you remove methane from methanol?

Answer 17

Condense it out