aqua_chem
Aquarium Advice Addict
I also mentioned kh being the carbonic element of gH. By my tests tds and gh are similar numbers, close enough to be the same.
Correlation is not causation. The primary component of groundwater in many places is calcium carbonate, so the levels are generally equal, but this is due to stoichiometry, not definition. KH is NOT a component of GH. They are completely independent of each other.
The amount of TDS will buffer the water up down accordingly. TDS is hardness. This is Wrong.
I'm sorry, but you're simply wrong on this. TDS includes KH, but is not limited to KH. A high TDS composed of non-buffering components will not buffer water.
"There are several ways to define acids and bases, but pH and pOH only refers to hydrogen ion concentration and hydroxide ion concentration, respectively. pH and pOH are only meaningful when applied to aqueous (water-based) solution.
As I explained, this is the oversimplification that we use to explain the basics of pH to non-physical science students. It's mostly correct. You can find a billion sources stating this because they are all targeted at beginners. Every Chem 1## college class in the country teaches this, and it is retaught correctly in upper level science classes when students have a better foundation to understand the nuance. One of my professors in undergrad once described chemistry education as the art of teaching rules, then breaking them. Please reread the wikipedia article on pH as it explains it in more accurate detail. Here is another page that explains activity vs concentration. I am 100% confident on this matter.