One ph direction is no better or more natural than the other.
As we were taught in high school Chem, any ph below 7.4 is acidic.
Things on the other side of the ledger, at a ph above 7, are alkaline (also called “basic” as in acid-base).
Mammalian cellular metabolism, aka the basic rules of being alive on planet Earth, runs best at a ph between 7.38 and 7.42.
Mrs. Pepperall used to say that her boy was quite a ph'losopher in his way.
An' yet, Hinnissy, I dinnaw what to do about th' ph'lippeens.
The use of ph for f in philip, is an orthographical expedient, founded upon etymological reasons.
But why should phrase be spelld with ph and s, and not f and z?
The dress of the ph male consists of black loose trousers surmounted by a short jacket with tight sleeves.
Like ph or f in English; as, a' phuill of the pool, phill returned.
1909, from German PH, introduced by S.P.L. Sörensen, from P, for German Potenz "potency, power" + H, symbol for the hydrogen ion that determines acidity or alkalinity.
now in English usually representing "f," originally it was the combination used by Romans to represent Greek letter phi (cognate with Sanskrit -bh-, Germanic -b-), which at first was an aspirated "p," later the same sound as German -pf-. But by 2c. B.C.E. had become a simple sound made by blowing through the lips (bilabial spirant).
Roman "f," like modern English "f," was dentilabial; by c.400, however, the sounds had become identical and in some Romanic languages (Italian, Spanish), -ph- regularly was replaced by -f-. This tendency took hold in Old French and Middle English, but with the revival of classical learning the words subsequently were altered back to -ph- (except fancy and fantastic), and due to zealousness in this some non-Greek words in -f- began to appear confusedly in -ph-, though these forms generally have not survived.
A measure of the acidity or alkalinity of a solution, numerically equal to 7 for neutral solutions, increasing with increasing alkalinity and decreasing with increasing acidity. The pH scale commonly in use ranges from 0 to 14.
PH or P.H.
A numerical measure of the acidity or alkalinity of a solution, usually measured on a scale of 0 to 14. Neutral solutions (such as pure water) have a pH of 7, acidic solutions have a pH lower than 7, and alkaline solutions have a pH higher than 7. The pH of lemon juice is 2.4; that of household ammonia is 11.5. The normal pH for human blood is 7.4. ◇ The letters pH stand for potential of hydrogen, since pH is effectively a measure of the concentration of hydrogen ions (that is, protons) in a substance. The pH scale was devised in 1923 by Danish biochemist Søren Peter Lauritz Sørensen (1868-1969).