paul wheaton wrote:
I'm pretty sure it is 8.0. But I'm having trouble finding definitive proof. Anybody know of a link?
Muriatic acid is another name for Hydrocloric acid (HCl), which is much stronger than Acetic acid (CH3COOH).
20% acetic acid (MW 60.05) is 200 Grams per liter or a 3.33 M solution. At room temp the pKa is 4.76 so the Ka is 1.737X10^-5 Ka=[A-][H+]/[HA]=[Conjugate base][Acidity]/(Associated Acid]=[x]^2/[3.33-x] Solve for x and you get 7.599X10^-2=[H] -Log10 of that gives you pH=2.119.
For 12.5% pH=2.22
For 10% pH=2.26
For 7% pH=2.34
For 5% pH=2.42
The problem comes when you add some bases and you tie up the acids and your final solution is less acidic, the 20% can handle a lot more than the 5% as you approach the pH's that botulism grows in.
rose macaskie wrote:I have been reading about chemistry which stresses me...This still leaves us with why in detail you put lime on soil and how much. what the base does to the acid in clays .
I shall get my chemistry tip top and explain it.