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

Rate of reaction

Announcements Posted on
Why bother with a post grad? Are they even worth it? Have your say! 26-10-2016
    • Thread Starter

    Apparently if you double the mass of magnesium used in a reaction between excess HCl and magnesium, there is little effect on the rate of reaction.
    The text book says that this shows that 'an increase in the surface area of magnesium makes little difference when the acid is in so great an excess'.

    My question is why do they say increase in surface area rather than increase in mass? Is it not good enough to say mass?

    Posted from TSR Mobile

    The reaction only takes place on the surface boundary.
    • Thread Starter

    (Original post by EricPiphany)
    The reaction only takes place on the surface boundary.
    Ah ok that makes sense! Thank you!

    Posted from TSR Mobile
Write a reply…


Submit reply


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: April 26, 2016
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.

What were/are your predicted grades?

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.