Well, I was sitting drinking some Schwepps soda water when I idly looked at the ingredients label. The ingredients were carbonated water and buffer salt.
“Buffer salt?” I thought.
“I wonder what buffer salt is and why its inside the soda water?” I mused aloud.
Sandra was sitting, idly, on the couch.
“Oh…” she said, “…in chemical reactions a buffer is that ingredient you use to control and stabilise the PH.”