Just one sec...
Hey! Sign in to get help with your study questionsNew here? Join for free to post

Calcium Chloride Conductivity

Announcements Posted on
Take our short survey, £100 of Amazon vouchers to be won! 23-09-2016
    • Thread Starter
    Offline

    3
    ReputationRep:
    Hi,

    In my chemistry homework there is a question on conductivity that I don't understand, can anybody help?

    'Solid calcium chloride does not conduct electricity. An aqueous solution of calcium chloride does conduct.

    Explain the different conductivities of solid and aqueous calcium chloride.'
    (2 marks).

    Thanks,

    Dan
    Offline

    3
    ReputationRep:
    It's asking why solid CaCl2 won't conduct electricity, but when dissolved in water it will. Why do you think that is?
    Offline

    0
    ReputationRep:
    Think about the arrangement of ions in solid calcium chloride and the ions in a solution of calcium chloride.

    In solid calcium chloride the atoms are arranged in a lattice structure, similar to that of sodium chloride. The atoms are in fixed positions and so cannot move to carry charge throughout the structure, which is what electrical conductivity is.

    In aqueous calcium chloride the atoms are not in fixed positions and therefore can move and carry charge.
    • Thread Starter
    Offline

    3
    ReputationRep:
    Is it because the ions are free to move through the water allowing them to carry charge (like free electrons in a metallic substance)?

    EDIT: Posted this before I saw motoe's post, woops!

    Thanks for your help.
 
 
 
Write a reply…

Reply

Submit reply

Register

Thanks for posting! You just need to create an account in order to submit the post
  1. this can't be left blank
    that username has been taken, please choose another Forgotten your password?
  2. this can't be left blank
    this email is already registered. Forgotten your password?
  3. this can't be left blank

    6 characters or longer with both numbers and letters is safer

  4. this can't be left empty
    your full birthday is required
  1. Oops, you need to agree to our Ts&Cs to register
  2. Slide to join now Processing…

Updated: November 11, 2012
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

Poll
Who is going to win Bake Off?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.