Hey there! Sign in to join this conversationNew here? Join for free
x Turn on thread page Beta
    • Thread Starter
    Offline

    0
    ReputationRep:
    Im awful at Chemistry and I have this question to do with aqueous KOH and HCL. Which do I calculate the mass for in the q=mcdeltaT equation?
    Offline

    18
    Use the mass of the water (as it is that you are measuring the temperature of).
    • Thread Starter
    Offline

    0
    ReputationRep:
    there is no water. It is adding KOH to HCL
    Offline

    18
    (Original post by SrtaSierra)
    aqueous KOH and HCL
    But you said there was :p:
    Offline

    2
    ReputationRep:
    (Original post by SrtaSierra)
    there is no water. It is adding KOH to HCL
    KOH and HCL are aqueous solutions. I.e dissolved in water. So it is the mass of the volume of the comined solutions.
    Offline

    0
    ReputationRep:
    are they not in aqueous solution?
    Offline

    11
    ReputationRep:
    You make the assumption that mass of the solid doesn't contribute to the mass of the water. For simplicity, therefore as density of water is 1 g/cm^3, so whatever volume of the combined solutions of KOH and HCl, that would be the mass of water(based on initial assumption), hence that is the mass you should use.
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: January 24, 2010
Poll
Do I go to The Streets tomorrow night?

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

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