PH 6 is much less acidic. An example of Ph 6 is milk. Whereas Ph1 is stomach acid (very acidic) :)
pH 1 is strong acidic pH 7 is neutral and pH 13 is strong alkali
pH 3 is more acidic than pH 6
From pH 6 - pH 0. pH 0 being the most acidic.
pH is to indicate the concentration, while the 'strength' is measures by other means.
A solution that has a pH of 6 is slightly acidic.
the least acidic would be the one closest to the neutral pH number of 7 (which is the pH of pure water, NOT salt water... salt water is slightly acidic i THINK due to salt content). so in the case given in ur question, the least acidic would be the substance with pH level of 6.
Ten times more acidic at pH=5 than at 6
pH = 7 is neutrality pH = 1 - 6 is Acidic pH = 8 -14 is Alkaline
1-6. 1 and 2 is strongly acidic. 5 and 6 is lightly acidic
On the ph scale an acid is numberd 1-6 1 being the most acidic and 6 being least acidic. (example level 1 a would be car battery; level six would be orange or lemon juice)
The ratio is 1:1 000 000.
Solutions with a pH less than 7 are acidic. Solutions with a pH greater than 7 are basic. Thus, a pH of 6.5 is in fact slightly acidic.