Results are out! Find what you need...fast. Get quick advice or join the chat
x

Unlock these great extras with your FREE membership

  • One-on-one advice about results day and Clearing
  • Free access to our personal statement wizard
  • Customise TSR to suit how you want to use it

GCSE chemistry help!! advanced balancing equations

Announcements Posted on
Find your uni forum to get talking to other applicants, existing students and your future course-mates 27-07-2015
Win top prizes in our mega results day giveaway... 24-07-2015
  1. Offline

    ReputationRep:
    If we are given H2SO4 + Al = ? + H2
    How do we know that the answer will be balanced out to be
    3H2SO4 + 2Al = Al2(SO4)3 +3H2

    i just dont get how Al2(SO4)3 is bonded ? ionically ?? covallently ? please i need answers
  2. Offline

    ReputationRep:
    I think it's ionically bonded, Al has a 3+ charge, SO4 has a 2- charge, we need the charge to add up to 0, so 2 Al gives 2x3=6 and 3SO4 gives 3x-2=-6, giving an overall charge of 0. Now that we have Al2(SO4)3, we know we have (SO4)3 on the right hand side, so we need 3 SO4 on the left, so we get 3H2SO4 on the left, similarly it's Al2 on the right, so we need 2Al on the left. Finally we have 3H2SO4 on the left, so we need 3H2 on the right.
  3. Offline

    ReputationRep:
    Hey there! Aluminium Sulphate is an ionic compound. The charge on an Aluminium ion is +3, and the Sulphate ion is S042-. You have to make sure that each component's total charge adds to 0. Therefore, the negative ion needs to have an overall of -6 and the positive as +6 as they cancel out.

    Al+3 - you need 2 of these
    SO42-- you need 3 of these.

    Al2(SO4)3
  4. Offline

    ReputationRep:
    Al3+ will ionically bonded to the complicated/compound ion SO42-, which is an ion formed from covalently bonded atoms. This is what then forms Al2(SO4)3

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

  2. Slide to join now Processing…

Updated: June 10, 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
Did you lie on your personal statement?
New on TSR

Results are coming...

No sweat. Here's all you need to make sure you're ready

Study resources
x

Think you'll be in clearing or adjustment?

Hear direct from unis that want to talk to you

Get email alerts for university course places that match your subjects and grades. Just let us know what you're studying.

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