pH terminololgy

[paulsutton]

This is sort of related to my post on Red Cabbage indicator in the Amateur Science section.

https://www.scienceforums.net/topic/131382-red-cabbage-indicator/

So in terms of experiments that cause a change in pH should this be referred to as increasing and decreasing pH of a solution / substance.

For example if I take Vinegar which is Acidic (so pH will be between i think 6 and 1,    and add Sodium Hydrogen Carbonate, which is an Alkali (pH 8 to 14).  then the acid either neutralised or becomes more alkali,  so the pH has increased.  pH 7 being neutral of course. 

I am trying to write up an experiment or an idea I have had at least, and want to make sure I use the correct terminology.

Thanks

Paul

[exchemist]

1 hour ago, paulsutton said:

This is sort of related to my post on Red Cabbage indicator in the Amateur Science section.

https://www.scienceforums.net/topic/131382-red-cabbage-indicator/

So in terms of experiments that cause a change in pH should this be referred to as increasing and decreasing pH of a solution / substance.

For example if I take Vinegar which is Acidic (so pH will be between i think 6 and 1,    and add Sodium Hydrogen Carbonate, which is an Alkali (pH 8 to 14).  then the acid either neutralised or becomes more alkali,  so the pH has increased.  pH 7 being neutral of course. 

I am trying to write up an experiment or an idea I have had at least, and want to make sure I use the correct terminology.

Thanks

Paul

Yes, pH can increase or decrease, or one can speak of a low (acid) or high (basic) pH.

[paulsutton]

Cool thanks

 

Paul

[MigL]

In any quantity of water there are a number of molecules which dissociate and re-associate   H₂O <> H⁺ + OH^- 

The potential Hydrogen is an inverse logarithmic measure of the number of H⁺ ions in solution and their reactive potential; and the reason water has a 'neutral' pH of 7.

I'm sure Wikipedia has an entry for pH.