The two simplest sequences to work with are arithmetic and geometric sequences. An arithmetic sequence goes from one term to the next by always adding (or subtracting) the same value. For instance, 2, 5, 8, 11, 14,... is arithmetic, because each step adds three; and 7, 3, â1, â5,... is arithmetic, because each step subtracts 4.
Report Abuse. Yes pH is temperature dependent. So if you have water with a pH of 6.9 (very mildly acidic) at 12 C, and raise the temp up to about 22 C, the pH will reduce to about 6.7, which is more acidic. Jason, only pure water is neutral... most water you come across on a daily basis is not pure and doesn't have a pH of 7. derekbradley4000 Â· 8 years ago.
The scale used to measure acidity is the pH scale. Water is pH 7 (ish) and as things get more acidic then the pH number gets lower. It's a log 10 scale, so 6 10x more acidic than 7 and 5 is 10x more acidic than 6. This would place vinegar in at about the pH 2-3 range. That's about the same a lemon juice, or even more scary, about the same as many popular fizzy drinks.