23. Acid-base titrations

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  • Опубликовано: 24 дек 2024

Комментарии • 12

  • @jazzybooooo
    @jazzybooooo Год назад +1

  • @czdaniel1
    @czdaniel1 6 лет назад +2

    Freeze the slide-image @ 3:45
    They are so close to making several good points I've found from other Intro-to-chem professors. Ammonia (N-H3) + "Strong Acid" is just a step away from the synthesis of Urea & how to manufacture fertilizer. Replace the words "Strong Acid" with Cyanic Acid (H-N-C-O). In this reaction (N-H3) + cyanic acid (HNCO) will stabilize as Urea, which is a C=O with two (N-H2)'s attached at the carbon. Urea is important as fertilizer because it's stable, you can buy it, take home, put on plants and water it. Once you're home & add water, that releases the ammonia, splitting the Urea making (two) ammonia & CO2 (one). Furthermore, I recall this _Urea_ being the first synthesized organic molecule. It was first created by a German chemist (Kolbe, who then had to invent the word "synthesize" to describe what he had done) which completely disproved the early chemical doctrine of _Vitalism_ that teaches "only living things can create the organic compounds needed for living things." [Kolbe is most remembered to history though for his vicious dismissal of the direction being taken in chemistry research by people like Van't Hoff (

    • @czdaniel1
      @czdaniel1 6 лет назад +1

      Also, Ammonia accepts protons from the cyanic acid molecules before stabilizing as Urea, thus explaining why fertilizer plants in Texas sometimes blow up.
      (Reference sources: Yale's Organic Chem intro courses, Stanford's Intro to Chemical Engineering, Georgetown's Ron Davis in the BioChem lecture series he created for T.T.C; & finally Kolbe's Wikipedia page)

  • @Li1190
    @Li1190 12 лет назад

    Wow MIT Chem is intense! At my University we didn't encounter we saved this material for the second semester

  • @brainstormingsharing1309
    @brainstormingsharing1309 3 года назад +2

    Absolutely well done and definitely keep it up!!! 👍👍👍👍👍

  • @adilaitbaev5456
    @adilaitbaev5456 Год назад

    14:38

  • @adilaitbaev5456
    @adilaitbaev5456 Год назад

    36:30

  • @SuperNov1978
    @SuperNov1978 13 лет назад

    excellent lectures,pls make such more lectures for phytochemistry

  • @ZachGramstad
    @ZachGramstad 9 лет назад

    Did no one in the class notice the typo in the clicker question?? 0.184 is supposed to be 0.0184. I'm sure that threw some people off.

  • @andrewdiggs9166
    @andrewdiggs9166 9 лет назад

    I hope all who watch this know about the titration thief greatest trick ever!!!!!

  • @gursimranpannu8405
    @gursimranpannu8405 11 лет назад

    I'm doing a little more intense, related matter in high school.

  • @adilaitbaev5456
    @adilaitbaev5456 Год назад

    THanks!