iodine clock reaction help Watch

monica
Badges: 0
Rep:
?
#1
Report Thread starter 6 years ago
#1
i am doing a level chemistry coursework on the iodine clock reaction, persulfate version
does anyone have a good method, so what i mean is, what concentrations of KI, starch, na2s203 and na2s208 should i use?
also what would be a good catalyst to use?
i have done this experiment today with concentrations of 0.02moldm3 na2s208, 0.025moldm3 na2s203, 0.5moldm3 ki and 1% starch solution,
also i dont have a lot of KI left, so if you can try to keep the amount of KI used in the experiment to a minimum?
thanks

also what should my aims be?
and what is ionic strength? and how is this relevant
0
quote
reply
shengoc
Badges: 11
Rep:
?
#2
Report 6 years ago
#2
it is an investigation. try with a sensible(use your scientific judgement what is too much, do your literature research beforehand). if reaction is too fast with your concentration, dilute them until you get suitable times/rates to be studied normally. if reaction is too slow, do the opposite.

the rest is all trial and error. won't be an interesting investigation if you are given the whole prep with all the ingredients.
0
quote
reply
X

Reply to thread

Attached files
Write a reply...
Reply
new posts
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

University open days

  • University of Warwick
    Undergraduate Open Days Undergraduate
    Sat, 20 Oct '18
  • University of Sheffield
    Undergraduate Open Days Undergraduate
    Sat, 20 Oct '18
  • Edge Hill University
    Faculty of Health and Social Care Undergraduate
    Sat, 20 Oct '18

Who is most responsible for your success at university

Mostly me (770)
90.38%
Mostly my university including my lecturers/tutors (82)
9.62%

Watched Threads

View All
Latest
My Feed