Hey there Sign in to join this conversationNew here? Join for free

half equation help

Announcements Posted on
    • Thread Starter
    • 0 followers
    Offline

    ReputationRep:
    1. write a half equation for reaction between calcium ions and hydroxide ions
    2. write a half equation for reaction between barium ions and chromium ions

    for 1. is this right:

    Ca2- + 2OH+ -> Ca(OH)2

    and for 2, what are the products?
    • 2 followers
    Offline

    ReputationRep:
    (Original post by The Bright Beast)
    1. write a half equation for reaction between calcium ions and hydroxide ions
    2. write a half equation for reaction between barium ions and chromium ions

    for 1. is this right:

    Ca2- + 2OH+ -> Ca(OH)2

    and for 2, what are the products?
    For the first one you need to swap the signs around, Ca is 2+ and OH is 1-, you might want to add state symbols as well.

    Not sure about second one, will edit if i work it out.
    • Thread Starter
    • 0 followers
    Offline

    ReputationRep:
    haha thanks

    and from 1, I deduced 2 should be BaCrO4
    • 0 followers
    Offline

    ReputationRep:
    These are ionic equations not half equations. Half equations are written for redox processes and involve electrons.

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?

    this is what you'll be called on TSR

  2. this can't be left blank
    this email is already registered. Forgotten your password?

    never shared and never spammed

  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. By joining you agree to our Ts and Cs, privacy policy and site rules

  2. Slide the button to the right to create your account

    Slide to join now Processing…

Updated: April 15, 2012
New on TSR

What are your A-level predictions?

Join our AS and A2 results day chat thread

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