Sunday, 21 April 2013

1.35 understand the relationship between ionic charge and the melting point and boiling point of an ionic compound

The bigger the difference in charge, the stronger the attraction: if you have + and - ions they will have a weaker bond than +3 and -3 ions. The stronger the attraction, the harder it is to break the bonds, this means that the melting and boiling points will be higher. So the bigger the charge of an ion, the higher the melting and boiling point.

19 comments:

  1. Thank you! You've been incredibly helpful - I've been using your biology blog too :)

    ReplyDelete
  2. I don't know where to contact you and tell you that YOU ARE AMAZING!! You must feel very proud!

    I have my chem exam tomorrow and I have no idea about anything in chemistry. Hopefully your blog will help me go through the syllabus nicely. Thanks a ton!

    ReplyDelete
    Replies
    1. Hehe, thanks! I did my chem then too! Hope it did help :)

      Delete
  3. shouldn't it be + and - ions not atoms and the same for the +3 and -3? :)

    ReplyDelete
    Replies
    1. Yes it should, thank you! changed it :)

      Delete
  4. This blog is so helpful, thank you! x

    ReplyDelete
  5. holy cow. i found heaven. on a website. THANK U SO MUCH FOR THIS

    ReplyDelete
    Replies
    1. Hahaha, high praise indeed! It's ok

      Delete
  6. Dear Hannah,

    Thank you so much for creating this blog. It has really helped me strive for my A*s in my IGCSE. You are truly amazing. Thank you once again.

    Regards,
    Terren

    ReplyDelete
    Replies
    1. Terren! Thank you for your comment :) I really hope you get the grades you want, good luck!

      Delete
  7. I'm kinda confused. I thought that having a greater charge and stronger electrostatic attraction was something that would increase the intramolecular forces but not have an effect on the intermolecular forces (i.e. make it more difficult for an ionic compound to react, but wouldn't have an effect on it's boiling point/freezing point because it doesn't affect the forces between the molecules.) I'm probably wrong but I'd like clarification

    ReplyDelete
    Replies
    1. The strength of charge definitely has an effect on the melting/boiling/freezing point of a molecule. I think the confusion might be in your definition of inter and intra molecular: intramolecular is within the ionic compound, so what the ions are doing to each other. Intermolecular would how this ionic compound related to another one.
      I can't really remember how to do chemistry any more hahaha, but I hope that cleared things up at least a little.

      Delete
  8. This comment has been removed by a blog administrator.

    ReplyDelete
  9. I'm sure you're aware of how AMAZINGLY WONDERFUL this blog/you are. But i'm gonna tell you one more time. Thankyou so much!!

    ReplyDelete
  10. Hi Hannah! I just wanted to say: all your blogs have been a ~massive~ help with my revision, and on behalf of everyone who’s used your material, THANK YOU. Thank you for taking the time to help us! You’re awesome. Truly! :) xxx

    ReplyDelete