When you make lemonade, you add lemon not just for the flavor. Even Kool-Aid has acid.

If you have a lemon, make lemonade.

Make up some sugar water. Ten percent sugar is about what Kool-Aid is. Taste it. See how much you like it. Then add some lemon juice and do the same thing.

Soft drinks are very acidic. When I was a child, I remember my parents using Coke to clean out a radiator.

It wasn't until (Louis) Pasteur that we knew how wine was made. Prior to that, it was like magic. In low-acid situations, you'd stick your nose in it and it would be disgusting.

More sugar will make it taste less acid.