Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    12
    ReputationRep:
    why is the answer by using a dehydrating agent wrong here??
    the ms answer was heat to constant weight/mass..
    Attached Images
     
    Offline

    17
    ReputationRep:
    What drying agent would you use?

    All of the common drying agents work by pulling water from the atmosphere and adding it to their waters of crystallisation. Why would water want to leave one crystal only to into another one? Surely there would just be an equilibrium. Oh the horrible maths.
    • Thread Starter
    Offline

    12
    ReputationRep:
    (Original post by Pigster)
    What drying agent would you use?

    All of the common drying agents work by pulling water from the atmosphere and adding it to their waters of crystallisation. Why would water want to leave one crystal only to into another one? Surely there would just be an equilibrium. Oh the horrible maths.
    no not drying agent, a dehydrating agent.... isn't it used to remove water of crystalization!!
    Offline

    17
    ReputationRep:
    Such as conc. sulfuric acid? How would you know the mass of the anhydrous solid?

    Much much easier to heat to constant mass. As Mr Punch would say, "That's the way to do it."
    Offline

    2
    ReputationRep:
    (Original post by pondsteps)
    why is the answer by using a dehydrating agent wrong here??
    the ms answer was heat to constant weight/mass..
    must be heated to a constant mass i think
 
 
 
Poll
Do you agree with the PM's proposal to cut tuition fees for some courses?

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.