The most common and popular sweet potato varieties (available at most stores) are Beauregard, ‘bunch’ Porto Ricos, and centennials.
Do this for every slice of potato that you have, with each section in a different jar.
Add fresh water once a day or so to keep the slips healthy. If any of the slips are not forming roots or begin to wilt, throw them out.
You can buy pH testing kits for your garden at a garden center or store.
Consider using a small space heater and a humidifier in a large closet or small room to cure the potatoes.