UnScramble this Word: o t o y n c t?

Questions

Carbonated water, with nothing else in it, can dissolve limestone, talc, and many other low-Moh's hardness---------- .?

Drinking water after eating reduces the ---------- in your mouth by 61 percent.?

Drinking water after eating reduces the acid in your mouth by ---------- percent.?

It takes about a half a gallon of water to cook---------- , and about a gallon to clean the pot.?

It takes about a half a gallon of water to cook macaroni, and about a ---------- to clean the pot.?