Professor Pang made this course very accomodating for students everywhere. Asynchronous lectures, light workload, and 24 hour exams. The exams, as well as the homeworks and lab reports were light in terms of courseload. I would spend about 4 hours a week max working on homework and lab reports. His slides are concise and informative, and we breeze through a lot of content in such a short time. His lectures are done on PowerPoint though, so no 2x speed. He is available for many office hours, and labs were not very time consuming (we could leave early). He is also very responsive to emails, so don't be afraid to reach out if you need help.

Overall, Professor Pang has been one of my favorite instructors so far, and he has made this class very fun! I would take this class again with him in a heartbeat.

Goated. Take this class.

***I took this class during the COVID-19 pandemic.
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This class is amazing! Take this with 20B(H) as it really does go in parallel with many of the topics learned in class. AP Chemistry helps a lot with the topics, but it is by NO means needed at all. Pang's asynchronous lectures are extremely helpful, and are in PowerPoint format rather than a video. It's super intuitive to watch the slides and listen along, rather than trying to rewind a video.
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The lab section with the TA is super chill as well. It never lasts longer than like 30 minutes, and after that, its an optional worksheet to complete. You can just use it as supplemental office hours or review, and you never have to stay past the initial TA lecture, which is graded for participation (usually a single clicker question via Zoom poll).
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Homework is light compared to a normal class, but the class is only 3 units. There's typically one lab assignment and one homework assignment each week, and they are all very manageable. Some of the later labs get a bit longer, but they are never difficult, and the majority of the time is formatting tables in Excel. Speaking of Excel, some technological knowledge is helpful, but the tutorials provided on how to use Excel mean that even with no prior knowledge of spreadsheet programs, you will be absolutely fine. Just check your work with some people from the class, and you really can't go wrong in this class. There's also one random writing assignment during the quarter that you can think of as a homework assignment with less calculation and more writing. It's easy and you can get some free extra credit if you do well on it.
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As for midterms and finals, they're called "quizzes," but its a just a really long comprehensive homework assignment. Again, nothing tricky at all, just a bit lengthy, but you get 24 hours for a 3 hour assignment. It's very doable in even just 3 hours (Math department has something to learn from this class), and you're allowed to review lecture slides and homework during the tests. There are no unfair questions and everything is made very easy and accommodating.
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Since the majority of the class is asynchronous or via TA discussions, you don't actually see Pang all that often. Do yourself a favor and go to office hours, this man is so caring and accommodating. His lectures are super straightforward and to the point for people who just want to get through the material fast, but he will take the time to elaborate and help out if you ask him to. It's really the best of both worlds.
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You're probably going to need to take this class anyway if you're looking at CHEM 20L reviews. Just do it with Pang and look forward to it. As long as you don't put all the work to the last day, this will be a very stress-free class.

*I took this class during COVID-19*

Dr. Pang is amazing!
I was a bit worried at first when I heard that Pang was doing asynchronous lectures, but 20L quickly became one of my favorite and most refreshing classes for the reasons provided:

1. All of the slideshows, procedures, instructions, and extra resources on CCLE were all SUPER CLEAR, precise, and easy to follow.
2. The midterm and final quizzes were both very fair, as the problems very much resembled the example problems on the slideshows and what was done in labs.
3. Dr. Pang is extremely responsive and helpful in office hours, and always goes out of his way to make sure you understand the material.
4. He is also very quick to respond to emails, and sends out frequent email updates about assignments.
5. Dr. Pang welcomes beginners! It is not intimidating to ask him even simple-sounding questions. He truly wants his students to succeed.

This man is a chiller. If you can, take the class with Pang. All the information is clearly presented and the instructions for the labs were very sufficient. He is accomodating for conflicts and is always willing to help.

But overall, I think who your TA is definitely affects you so make sure you get a good TA. My TA was Bocheng and he was super great with grading. He wasn't nitpicky with points on the HW and Labs, and made exceptions to the late policy. Although he wasn't great at responding to emails and his lab lectures were kinda dry, I'd take it with him again.

The class is laid out with 5 main components: lab section, hw, lab reports, one essay, and exams.

The LAB SECTION is just a ~40 minute lecture by your TA on the weeks material and you go into a breakout room with a student and do a couple practice problems for ~10 minutes. You don't have to get the right answers and you can leave whenever. It might be daunting to have 2 and a half hour of lab on MyUCLA, but dw it never takes more than an hour.

The HW is usually pretty easy, takes half an hour to an hour, and is due every Tuesday. You "watch" a lecture (voice-over in a powerpoint) and then answer some questions.

The LABS are probably the most difficult/time consuming by far. It's pretty self-explanatory, but he gives you very detailed instructions on what to do. The GroupMe will be your best friend to check your work because they do grade by accuracy. Sometimes the labs will take 30 minutes, sometimes they'll take 4 hours, but usually theyre in the ballpark of 1-2 hours.

The ESSAY is pretty easy I guess. Our prompt was on an oximeter (covid), but the prompts will prob be different in the future. He gave up to 5 points of EC (on a 20 point assignment) which is pretty nice.

The midterm and final "quizzes" are much more extensive than quizzes but oh well. We had 24 hours on them, so while it was lengthy, I was able to complete it to the best of my ability. The questions were fully covered in the material so it wasn't that hard at all.

Amazing class! Definitely recommend taking this concurrently with 20B as it definitely helps bring the concepts to life.

The class is a lot of work- you have weekly prelabs, postlabs, a small "essay" later in the quarter that provides extra credit as well as midterm and a final. However, the work isn't necessarily difficult as long as you follow all of the instructions and maybe even check with your friends. Stay on top of things and you'll be fine!

I would highly recommend taking this class with Dr. Pang! He is extremely clear in his lectures, and you can tell he's passionate about making sure every student can succeed. He's often funny, and his lectures are very well paced throughout the 50 minute allotment of time. The only real work you have to do is a pre-lab and post-lab for the experiment every week. These were definitely manageable, but there were a few weeks early in the quarter where these assignments took a lot of time and effort, but it eased up after that. The experiments themselves were thoughtful and beneficial to have a physical understanding of common topics that are covered in Chem 14/20. This was a great class and I would undoubtedly take it again!

I decided for my reviews now I will justify my numbers for the review:

Number Score:
Easiness: 5 - The class is pretty easy, content wise its not hard to understand. The labs are interesting and if you put in at least some amount of effort to actually learn the content and learn for the sake of learning you should get an A.

Clarity: 5 - Very clear professor, gives very clear instructions and very clear during lectures. He wants you to understand the concepts behind the lab and its connection to your specific field. He does talk pretty fast and does not record lectures so be ready for that.

Workload: 3 - Post Lab and Prelab work is alot of busy work so expect that pretty much every week.

Helpfulness: 5 - Super helpful during office hours and really good at explaining concepts during office hours.

Overall: 5 - Professor Pang was great probably my favorite professor I've had at UCLA.

More Extensive Review:
Professor:
Professor Pang is one of the greatest professors I've had at UCLA and my personal favorite one I've had so far. He is super helpful and sometimes funny. He really cares about the students and wants them to learn. He wants them to understand the actual concepts in the lab and their real world significance. One of my favorite things that professor pang did is he would come by during your lab sections and check on the students. He would give compliments if a student did a good titration or a good separation etc. I could not speak more highly of Professor Pang.

Class:
Personally I really love chemistry so I loved this class, I enjoyed my labs. There was alot of busy work for the pre and postlabs but nothing you can't handle. I really liked my TA and he was super helpful so that contributed to my positive experience of the class. For the midterms and finals be careful because alot of people sleep on it and finish with a B. To study for it I recommend doing the Practice Problem Sets (PPS). I believe if I remember correctly an A is up to 90% rather than 93%. So it shouldn't be too bad. Good class overall.

Professor Pang is an incredibly kind, caring, and understanding professor. His lectures and overall class are clear, concise, and organized. He cares about student learning which is evident through his office hours as he explains concepts thoroughly and slowly, regardless of their simplicity. I do wish he posted recordings as he did in previous years, but that is a minor caveat.

Dr Pang was very organised, consistent and reasonable with his expectations. He made the content applicable and interesting, and focused on delivering the material efficiently. I would take another one of his classes if I had the chance.