Chromotography

Question 1

if a substance is interacting with the stationary phase what does this mean

Answer 1

it is taking longer to reach the solvent front

Question 2

if a substance is interacting strongly with the mobile phase what does it mean

Answer 2

the substance is moving quickly

Question 3

what is the tlc plate made of

Answer 3

aluminium and is coated in silica

Question 4

if a substance is more polar, what phase is it likely to interact with

Answer 4

more polar means it will interact with stationary phase stronger

Question 5

what phase will a less polar substance interact with

Answer 5

the mobile phase, meaning it will rise with the solvent and be higher up the tlc plate

Question 6

what does it mean if a substance has a high affinity to a stationary phase

Answer 6

it is strongly interacting with the tlc plate, taking longer to elute up the plate

Question 7

what is the equation for rf

Answer 7

distance travelled by sibstance / distance travelled by solvent