- Messages
- 176
- Reaction score
- 148
- Points
- 53
May June 2012 ....Paper 42 ...Q 1 (c)(1)......What is the concept here ...????...why are we subtracting (Delta H formation of MgCl2(s) and MgCl2(aq) ) to find (deltaH sol).....????? http://papers.xtremepapers.com/CIE/... AS Level/Chemistry (9701)/9701_s12_qp_42.pdf