In chemistry, which number on the pH scale indicates a neutral substance?

Vinegar is not a 2. Hydrochloric acid from your stomach is around 2. If vinegar were a 2, it would burn your hand if you touched it, and start dissolving any food you mixed it in.

mikhawk317, I wouldn't have thought it either, but per the internet, vinegar has a pH of around 2.5.

YoungAtHeart, not every thing you read on the internet is true. I've come across several incorrect statements that were the result of indiscriminate use of cut-and-paste.

I remembered something from chemistry over 40 years ago