Any suggestions on how to remove thin set from ceramic tiles? I have 14 tiles I have unseated from a terrazzo floor, but I have to reuse those tiles and need to remove the thin set.

I do this with a right angle grinder and a diamond cup wheel. Does a great job and is very quick. The cup wheel is about $100 so for you a cheaper alternative would be a diamond dry cut turbo blade for the grinder. DeWalt makes one sold at Home Depot for about $30. Use it to grind off the thinset. Makes a lot of dust so do it outside, wear a mask and eye protection. Put an old towel or pillow under the tile to keep it from breaking due to the vibration of the machine as it grinds the thinset. Hold the grinder slightly angled to the tile and drag the blade across the thinset. You will get the hang of it after awhile. Work from the middle of the tile out so you dont ding the edge of the tile.