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    • Bob Worley
      Bob Worley posted Re: Titrations
      in Talk Chemistry on Nov 28 at 10:48pm GMT
      10 Replies
      This is the method I was taught at school and University in the 1960s.This film is from 2008. But don't let's quibble too much. There are many students in the country not even able...
    • Ian Kershaw
      Ian Kershaw posted Re: Naming alkyl halids
      in Talk Chemistry on Nov 28 at 10:19pm GMT
      2 Replies
      I agree with Andrew's naming. I also use freeware, KnowItAll by Bio-Rad, to draw structures.
    • Peter Hoare
      Peter Hoare posted Re: Titrations
      in Talk Chemistry on Nov 28 at 4:21pm GMT
      10 Replies
      Interesting thread! I’m a (relative) oldie (A levels 79-81) but I’ve never heard of this dominant/non-dominant hand business? I am right-handed and have always preferred to...
    • Andrew Wilkins
      Andrew Wilkins posted Re: Naming alkyl halids
      in Talk Chemistry on Nov 28 at 11:42am GMT
      2 Replies
      First one, 2-iodo-4-methylpentane
      Other one, 2-chloro-4-methylpentane

      If in doubt, I draw the structure in Chemsketch (freeware) and get it to name the structure.
       
    • nahid ahmadi
      nahid ahmadi posted Naming alkyl halids
      in Talk Chemistry on Nov 28 at 11:19am GMT
      2 Replies
      Dear, 
      how can we name the following compondes?
      CH3CH(I)CH2CH(CH3)2
      CH3CH(Cl)CH2CH(CH3)2
    • Stuart Humphreys
      Stuart Humphreys posted Re: Titrations
      in Talk Chemistry on Nov 27 at 5:08pm GMT
      10 Replies
      A lot of my students, after the rough titration, let the solution out fast to near the end-point, then set up a one drop every two seconds flow rate. that way only one hand is needed...
    • Peter Borrows
      Peter Borrows posted Re: Titrations
      in Talk Chemistry on Nov 27 at 4:13pm GMT
      10 Replies
      When I was in the 6th form, in the late 1950s, I was taught to use the non-dominant hand because you were slightly pulling the tap into its socket. Doing it the other way could resul...
    • Andrew Wilkins
      Andrew Wilkins posted Re: Titrations
      in Talk Chemistry on Nov 27 at 3:41pm GMT
      10 Replies
      I would argue you have more control over the tap if you use your dominant hand.  I used to try to identify those students that struggled with titrations and get them to do a rough ti...

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