Ph Definition and 512 Threads

Changes Of pH values... Could You Guys Help Me Out With THis Question Please, Why would the pH of a solution not change by much when a little amount of acid or alkali are added to the solution??

I know this is simple, but I am a bit confused 1) find the pH of 12.1 M HCl - the negative log gives me -1.8. What am I doing wrong 2) 50% NaOH (roughly 15 M) - I am not sure how to do this one either thanks nautica

can someone give me some insight to solve this in detail : what is the ph of .01 Naoh ? and what is the ph of .035M acetic acid ?

Hi I just need to know if there was a standard concentration for the acid and base that I am going to use to change the pH of the media that I am making for bacteria? I am using NaOH and H2SO4. THanks

Anybody got a relationship between fresh water PH level, and amount of + or - net charge, say per cubic meter of H20, at a nominal temperature. Rivers are usually alkaline, thefore have a net -charge, the cubic meters flowing at X meters/sec, and therefor function effectively as a fat wire. I...

So I have an chem assignment which I've been going through for the past week or so, but the last question has provided somewhat of a stumbling block. Here it is, So from the question, I have gathered the following, High pH solutions absorb at higher wavelenghts. Whereas low pH solutions...

I know that Kw is equilibrium constant for water.. but what is Ka and Kb? I Is Ka equilibrium constant for acid and Kb equilibrium constant for Kb? If so how can u find those?? For example..here is an equation Kw = [OH-][H+] = 1e-14 What is the Ka and the Kb? Someone told me that...

__________HA <------> H+ + A- initial (mol) .1 ________ 0 ___ 0 change __ -x _______ +x ___ +x final _____.1-x _______ x ___ x Ka = 10^-8 find pH of .1 mol acid since ka X 100 = 10^-6 < .1 can use initial concentration: .1-x = .1 Ka = [H+][A-]/[HA]...

Often while channel surfing late at night, I'll see an infomercial with some doctor who claims that all ailments are caused by too much acidity in the body. So far, I have always flipped the channel immediately and given it no further thought. Now while web-surfing I found this website which...

here is a buffer problem in my HW that I'm not sure how to do. Plz help me. Plz show me how. Thanks a lot. Formula: pH = pKa + log([B-]/[HB]) ***A buffer is made up of 0.500 L each of .300 M KH2PO4 and .400 M K2HPO4. Calculate a) The pH of the buffer after the addition of 0.0500 mole of...

Help me with ph pH = -log[H+] Express the following concentrations in terms of pH. [H+] = 1 * 10^-5 mol/L

When the CuO (copper oxide) is put into water, it does not dissolve in water. But why the pH value of the water does not change?