August 18, 2019, 09:50:12 PM
Forum Rules: Read This Before Posting


Topic: REPOST: Determining Equilibrium COnstant Post Lab Question  (Read 295 times)

0 Members and 1 Guest are viewing this topic.

Offline ChargePositive

  • Regular Member
  • ***
  • Posts: 14
  • Mole Snacks: +0/-1
REPOST: Determining Equilibrium COnstant Post Lab Question
« on: March 08, 2019, 02:55:11 PM »
*Re-posted because images did not show up*

Hello all,

So I've just done a lab where we prepare 5 different solutions of Fe3+, SCN-, and NO3. The concentration of SCN- was varied. At the end I calculated what the equilibrium constants are and am working on the post lab content. It asks me an " By what percentage did the initial concentration of SCN⁻ increase from smallest to highest?"

Now I don't know if I'm just being dense, but I have no idea what this means. I've attached my data tables as I'm pretty sure it has something to do with that.

I would be greatly appreciative if anyone could clear this up for me, thanks!

Lab Question (Green Highlight is what I'm Confused Abut)


Table 2 - Initial Concentrations of SCN- of the 5 Different Solutions


Table 3 - Equilibrium Concentrations of SCN- of the 5 Different Solutions



IF IMAGES DO NOT SHOW: https://imgur.com/a/NyZn8w0

Offline Borek

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Posts: 25123
  • Mole Snacks: +1650/-396
  • Gender: Male
  • I am known to be occasionally wrong.
    • Chembuddy
Re: REPOST: Determining Equilibrium COnstant Post Lab Question
« Reply #1 on: March 09, 2019, 03:33:48 AM »
If the initial concentration in the first sample was 1, and in the last 3, that would mean increase by 200%, wouldn't it?
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info, pH-meter.info

Sponsored Links