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

    Hi, I wanted to query how to answer this question...

    A solution of calcium dihydrogenphosphate, Ca(H2PO4)2, in water acts as abuffer solution. Suggest, with the aid of equations, how this buffering action takes place.

    I am struggling with the equations. Previously in the question it talks about dissociation of the H2PO4- ion (which I got correct), so I assumed this was one of the equations. However, what is the equation for the production of the salt? Once I have these I know how to explain how the buffer works, I'm just struggling to find the two equations!

    When it acts as an acid, it (the H2PO4- ion) will lose 1x H+

    When it acts as a base it will gain 1x H+.
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...
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.