CPU change on latitude E6220

Hello all,

I have the following:

- Dell latitude E6220 with CPU i3-2310M

- Dell latitude E6230 with CPU i5-3340M

Both the CPUs have the socket FCBGA1023, FCPGA988

I'd like to know, first if is technically possible  physically change/remove the CPU from those laptops, second If I can exchange the CPUs between the laptops so put the i5 on the E6220 and the i3 on the E6230.

Thanks in advance.