Upgrading Memory on MacBook Air 2011 11 inch Model

No, the RAM is soldered onto the Logic Board. Only the SSD is replaceable/upgradeable.

"MacBook Air '11 logic board (backside)

Note the two rows of chips on the bottom edge these of the DRAM chips which are soldered to the logic board and can't be swapped out."

"I'll just leave it here.

https://www.youtube.com/watch?v=CTsEJ49L..."

Well if you have the equipment and the knowledge, yes it can be done, but the question is, should you do it? Probably not, its an older macbook and its not worth it