Science 9 Final- Hexavalent Chromium


For my final project for Science 9, I decided to look at hexavalent chromium (chromium VI), which I will tell you all about in my informative video. The link can be found here:


If you are unable to open that, here is the original PowerPoint:


My sources can be found here:

Caitlin’s Sources

6 thoughts on “Science 9 Final- Hexavalent Chromium”

  1. Hi Caitlin!
    I really enjoyed your presentation and how you combined your love of law and your love of chemistry to create such an interesting project. A question I have is this. What are some examples of Cr (VI) poisoning in Canada? as you seemed to focus a lot on the states. Thanks for teaching me something new! :)

  2. Hey Caitlin!
    Your ‘Ted’ talk is amazing! I had never heard of hexavalent chromium or chromium 6 before listening to your ‘Ted’ talk. I had no idea that chromium poisoning could have such disastrous consequences in our society. I was really surprised when you showed us that image of contamination levels in the United States; there were a lot more places that had contaminated water than I expected.
    Do you think we’ll be able to find a way to effectively get rid of contaminated waste water in useful ways? Is there a possibility of using the contaminated waste water for something else or converting it into something useful?
    I’m not sure if it’s possible, but I just wanted to ask if you think there is, or think there will be.
    Thank for making me more aware of a ‘current event’!
    -Grace :))

  3. Hey Caitlin! This presentation was a super cool combination of both science, and history, which can make it appealing to multiple people, with different interests. I loved how you brought up real world examples that clearly show the problem with Cr poisoning so that people that did find your video interesting can search up said example and continue to learn more about the topic even after the video ends. The only question I have for you is are there any possible alternatives to chromium for cleaning water, and are these alternatives cost effective and powerful enough?

  4. cant other things get into the cell by facitilated diffusion? why and how does the cell break it down to 3 from 6?

    Caitlin, your Ted Talk is so well done! I really like how you incorporated chemistry, biology, and environmental science together to look at every aspect of this element’s relevance. Additionally, you were able to cover it and explain everything very well within 6 minutes, and it was really easy to follow along on the information you provided. When talking about the cell, you mentioned that the chromium is able to get through the semi-permeable membrane by latching onto a carrier protein (facilitated diffusion), which made me wonder how many other things are able to do the same thing or whether this is a characteristic of only elements with a charge of negative 6. Additionally, what makes the chromium have a charge of 3 once inside the cell? You did a wonderful job on your presentation, keep up the good work!

  5. Hi Caitlin!
    I loved your presentation, it was super informative! I had no idea that Chromium (VI) had these effects, or that it was even able to contaminate water sources! I have one question: how does Chromium (VI) affect plant life? You gave a lot of interesting details about how it can affect people, but what about plants? Thanks so much!

  6. Hi Caitin!

    I really enjoyed seeing your passion for the topic in your well explained TED Talk! Although I had trouble viewing the video due to a server issue with OneDrive, the amount of work you put into making your video accessable and understandable is very impressive! From what I could see of the video, your visuals were on point, and the presentation added a layer of explaination for the scientific study you clearly researched in great depth. Wonderful presesntation on a very cool subject and inquiry. Great job!

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