Linoleum to ceramic tile concrete help

[crooner]

So, I'm pulling up my old linoleum in the kitchen to replace it with porcelain tile. I used a scraper and henrys adhesive remover to help get up the old glue. Here is a before picture.

Here is the concrete after a full day of scrubbing and scraping to the best of my ability with the adhesive remover.



Two questions.
One, I got the concrete as smooth as possible but it seems that some of the glue is impregnated in the concrete is that typical?

Two, I did the water test to see if the concrete soaks in the water or stays on top meaning a sealer has been applied. Well, it seems that I have areas where the water is not soaking into the concrete. But, I have also washed and moped it today a dozen times with the adhesive remover. Do I need to let it sit over night and dry out before I try the water test?

Or, should I just go ahead and acid wash it?

[miketyler]

Are you prepping for concrete stain or for ceramic tile? If the concrete is clean, dry, and without any major cracks or level issues, I would start laying tile.

EDIT: Meant to add, if you have doubts about surface condition and/or adhesion, you migt consider a very dilute muratic acid wash.