uwloo

CHEM 266LOrganic Chemistry Laboratory

Units
0.25
Faculty
Science
Subject
Chemistry

When it runs

  1. F24
  2. W25
  3. S25
  4. F25
  5. W26
  6. S26
  7. F26
  8. W27
  9. S27

Ran in 5 of the last 7 terms. Winter 2027: not on the schedule. Spring 2027: schedule not out yet.

Selected experiments for students taking (or who have taken) CHEM 266.

Prerequisites

  • Must have completed at least 1 of the following:
    • CHEM123L - General Chemistry Laboratory 2 (0.25)
    • CHEM125L - Chemical Reaction Laboratory 2 (0.25)

Corequisites

  • Completed or concurrently enrolled in:
    • CHEM266 - Basic Organic Chemistry 1 (0.50)

Antirequisites

None listed.

Leads to

Fall 2026 sections

Enrolment from UW Open Data, which can trail Quest by up to two days. Instructors and rooms: Schedule of Classes.
SectionClassEnrolledMeets
LAB 001699139 / 42Sep 15 14:30–17:20
Sep 29 14:30–17:20
Oct 20 14:30–17:20
Nov 3 14:30–17:20
Nov 17 14:30–17:20
LAB 002734542 / 42Sep 22 14:30–17:20
Oct 6 14:30–17:20
Oct 27 14:30–17:20
Nov 10 14:30–17:20
Nov 24 14:30–17:20
LAB 003734635 / 42Sep 15 17:30–20:20
Sep 29 17:30–20:20
Oct 20 17:30–20:20
Nov 3 17:30–20:20
Nov 17 17:30–20:20
LAB 004734740 / 42Sep 22 17:30–20:20
Oct 6 17:30–20:20
Oct 27 17:30–20:20
Nov 10 17:30–20:20
Nov 24 17:30–20:20
LAB 005734841 / 42Sep 16 14:30–17:20
Sep 30 14:30–17:20
Oct 21 14:30–17:20
Nov 4 14:30–17:20
Nov 18 14:30–17:20
LAB 006734942 / 42Sep 23 14:30–17:20
Oct 7 14:30–17:20
Oct 28 14:30–17:20
Nov 11 14:30–17:20
Nov 25 14:30–17:20
LAB 007735042 / 42Sep 17 14:30–17:20
Oct 1 14:30–17:20
Oct 22 14:30–17:20
Nov 5 14:30–17:20
Nov 19 14:30–17:20
LAB 008735141 / 42Sep 24 14:30–17:20
Oct 8 14:30–17:20
Oct 29 14:30–17:20
Nov 12 14:30–17:20
Nov 26 14:30–17:20
LAB 009735241 / 42Sep 18 11:30–14:20
Oct 2 11:30–14:20
Oct 23 11:30–14:20
Nov 6 11:30–14:20
Nov 20 11:30–14:20
LAB 010735338 / 42Sep 25 11:30–14:20
Oct 9 11:30–14:20
Oct 30 11:30–14:20
Nov 13 11:30–14:20
Nov 27 11:30–14:20
LAB 011735441 / 42Sep 18 14:30–17:20
Oct 2 14:30–17:20
Oct 23 14:30–17:20
Nov 6 14:30–17:20
Nov 20 14:30–17:20
LAB 012735541 / 42Sep 25 14:30–17:20
Oct 9 14:30–17:20
Oct 30 14:30–17:20
Nov 13 14:30–17:20
Nov 27 14:30–17:20
LAB 01374670 / 42Sep 14 14:30–17:20
Sep 28 14:30–17:20
Oct 19 14:30–17:20
Nov 2 14:30–17:20
Nov 16 14:30–17:20
LAB 01474680 / 42Sep 21 14:30–17:20
Oct 5 14:30–17:20
Oct 26 14:30–17:20
Nov 9 14:30–17:20
Nov 23 14:30–17:20

Reviewed on UW Flow

74% liked it72% easy85% useful

From 219 ratings and 44 comments on UW Flow. The most helpful comments, quoted as written, without names. Read them all on UW Flow.

  • I took this course in Fall 2019. The instructors for this course were Leanne Racicot and Braden John Kralt. The mark breakdown of this course is as follows: 10% performance grade, 15% online pre-lab quizzes with two attempts each, and 75% informal lab reports spread across multiple experiments. No final exam. This is a bi-weekly lab and there are 5 experiments in total. Unlike CHEM 120L and CHEM 123L, there is no lab manual for this course. Everything is completely online. The performance grade (like the general first-year chemistry labs) is out of 10 for each experiment and it is generally very easy to get full marks as long as you a) work safely, b) are able to recover the product, and c)…

    Dec 2019 · liked it · 2 found this helpfulOn UW FlowRemove this

  • marta is bae

    Mar 2016 · liked it · 2 found this helpfulOn UW FlowRemove this

  • The lab reports for this course were similar to ones in first year chem (120, 121), though I found they were marked a bit harder. The course is composed of the lab worksheets/ reports, pre-lab quizzes, and the final exam. The labs themselves weren't that bad, though they can be tedious. I took this lab alongside the lecture, and I found it didn't really help to reinforce the content.

    Dec 2025 · liked it · 1 found this helpfulOn UW FlowRemove this

  • Grading is inconsistent.

    Jan 2026 · liked itOn UW FlowRemove this

  • This lab class is structured pretty similar to first year chem labs which was pretty nice, they have pre-lab quizzes and procedure summaries to fill out before hand as well, however there were only 3 reports to do (same style as chem 120L/121L) and the other 3 labs just had in class worksheets to do before you left. Couple things to note however: first, I had the lab in the ESC and the room is very loud with a bunch of fume hoods running, and very cramped, so actually hearing or seeing anything during the pre-lab talk is near impossible. the fume hoods were shared 2 pairs a fumehood (which is kind of crazy), but you might get lucky like me and get a fumehood with your partner all to…

    Dec 2025 · liked itOn UW FlowRemove this

Discussed on r/uwaterloo

38 posts and comments in 36 threads mention CHEM 266L, September 2013 to December 2024. Quoted word for word, newest first; each reply sits under the post and the comment that started its branch. Search r/uwaterloo for newer posts.

Fall 2024

Spring 2024

Fall 2022

Winter 2022

Do you need Chem 125 for Chem 266? 2 points, 2 comments

“I took 120 and 123 already but I think I heard that you need 125 too”

u/_sheeko: “CHEM 125 is an anti requisite to CHEM 123, so you won’t get a credit for taking it. I took CHEM 120 and CHEM 123 (with their respective labs) and that was enough for me to take CHEM 266 and CHEM 266L. Good luck, buddy!”

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Fall 2021

Study for Chem 266L 2 points, 2 comments

u/WatercressAcrobatic1: “Hi, Does anyone have any advice on the best way to study for Chem 266L's lab exam. I am currently online, but I have no idea what to expect. Should I just memorize the PLQ's? Or Should really learn the material in the workbook. Any help is appreciated thank you.”

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Fall 2020

CHEM 266L 3 points, 2 comments

[deleted]: “Is anyone else having trouble finishing assignments? I find them pretty difficult sometimes although I haven't taken CHEM 266 in a few years.”

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Spring 2020

Check it elsewhere for Fall 2026

Calendar versions

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