Will muratic acid delime a coffee pot?

It will probably de-everything. That stuff is the strongest chemical you can buy for home cleaning, bordering on industrial. Unless you watered it down considerably, it's going to destroy whatever you put it in, especially cheap glass\plastic coffee pots, even worse if you try the brew-through cleaning with it. I'd stick with the old white vinegar trick or even one of the commercial coffee cleaners.

Muratic acid is beyond overkill for that job, and dangerous as hell. By the time you bought it and the safety gear, you might as well by a whole new coffee maker.