I've got a batch of cider that I've kegged. I did so at about 1.011 (OG was 1.052 IIRC). While the yeast activity will decline as the keg chills, I'd like to stop it completely so that I can bottle some of this cider.
I've got some potassium metabisulfite, will this do the job? If so, how much should I use for 4.5 gallons?