ALEKS - Identifying Precipitation, Combustion, and Acid-Base Reactions

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  • čas přidán 8. 11. 2017

Komentáře • 20

  • @helenbarrios3425
    @helenbarrios3425 Před 4 lety

    thank you so much for making these videos!!!! they help so much

  • @osmanhameed9304
    @osmanhameed9304 Před 3 lety +1

    This helped so much, thank you! I was so confused with the difference between precipitation and acid base reaction

  • @esma4379
    @esma4379 Před 2 lety +2

    the FeSO4+PbCl2 one I got wrong, is precipitation and double replacement.

  • @samyen3210
    @samyen3210 Před 6 lety +34

    1:55 why wasn't that a double reaction as well?

  • @fialkafialka9122
    @fialkafialka9122 Před 5 lety

    Thank you 😊

  • @alexandragomez2201
    @alexandragomez2201 Před 2 lety

    so helpful! thanks

  • @BOLYANA
    @BOLYANA Před rokem

    Thanks a ton

  • @kierap
    @kierap Před rokem +2

    i’m tired

  • @alexandrialynch2072
    @alexandrialynch2072 Před 4 lety +4

    why isn't the second one a double replacement as well?!?!? like the second precipitation one on the first page?

  • @gabychuels2955
    @gabychuels2955 Před 3 lety

    this video gave me ASMR while teaching me chemistry thank you

  • @GarrettStJohn-nf8tz
    @GarrettStJohn-nf8tz Před 4 lety +1

    Sick last name

  • @konstantinrebrov675
    @konstantinrebrov675 Před 4 lety

    How do you know which compound is a solid, liquid, or gas? What are the rules for this?

    • @TonyStJohn
      @TonyStJohn  Před 4 lety

      I'm saying the phase based on the phase labels that you can see after the chemical formula - (s) for solid, (l) for liquid, (g) for gas, and (aq) for aqueous, which means dissolved in water.

    • @konstantinrebrov675
      @konstantinrebrov675 Před 4 lety

      @@TonyStJohn Without having those labels, is there a way to tell if a compound is a solid, liquid, gas, or aqueous, just by looking at the chemical code?

    • @TonyStJohn
      @TonyStJohn  Před 4 lety

      @@konstantinrebrov675 Very interesting question! The answer is yes, but really only after years of study and very good understanding of intermolecular forces. For instance, at room temperature, Chlorine is a gas, Bromine is a liquid, and Iodine is a solid. This has to do with the intermolecular forces working between the molecules of each. Likewise, if we look at hydrocarbons - propane is a gas, pentane is a liquid, and once you get to very large hydrocarbon chains you end up with solids. Salts (metal cation + non-metal anions) will always be solids unless they are dissolved in water (then they will be aqueous) - and the reason for this is again due to the attractions between the chemical species.

    • @konstantinrebrov675
      @konstantinrebrov675 Před 4 lety

      @@TonyStJohn Iodine is a liquid at room temperature. I know this because I have a small bottle with liquid iodine for first aid purposes. There is no precipitation inside the bottle at all.

    • @TonyStJohn
      @TonyStJohn  Před 4 lety +3

      @@konstantinrebrov675 that iodine you have is actually a solution of iodine - so it is mixed with water or ethanol most likely. Elemental iodine is a solid at room temperature: en.wikipedia.org/wiki/Iodine