Recent content by qwerty1232

The experiment is basically to find the ka of HOCl at various temperatures. However, we've been unable to find each of the concentrations separately, so have just used a pH meter to investigate the extent of dissociation. However, the change in pH was fairly substantial as temperature increased...

Do you mean calculate it by working out the ka? This is what I have been trying to do, but unfortunately cannot due to having so many chemicals in the solution (we were performing a titration). Basically, we were titrating NaOCl to find the concentration of HOCl/OCl- at various temperatures...

The extent of dissociation of a weak acid might be different at different temperatures. So if the same concentration of strong acid was added to solutions with different concentration of H+ already, would there by any difference in the extent to which the reverse reaction proceeds (to restore...

I have been researching extensively, but am unable to find if the extent of the common ion effect is influenced by the concentration of the common ion already in the solution? For example, if there are two solutions of weak acid which have dissociated to a different extent, would the addition of...

That's what I assumed, but do you know if there's a reason for this? Do the factors that affect the strength of an acid (eg. stability of conjugate base due to resonance etc., polarity of molecules) contribute to the enthalpy or entropy of the products and reactants. Possibly if they do, I...

Can I also ask, on a slightly related topic, do you think a weak acid would dissociate fully if it was heated to a large enough temperature? What sort of temperatures would be required?

Is it Cl-, I2 and H20?. Do you think there is a way of finding just the concentration of HOCl or OCl- by itself, given that I know the pH? Or would it be too hard given all the other reactions occurring?

We haven't really looked at redox reactions yet. i just know that the oxidation of I- by HOCl or OCl- requires the presence of H+ (provided by H2So4).

Yeah, that's probably true - I am a bit confused and stressed! What is the reaction consuming H+?

Okay, sorry - here goes: 1. Added 25mL of 10% NaOCl solution (diluted 1:50) 2. Added 10mL of KI (shouldn't affect) and 10mL of approximately 2.0M SUlfuric acid (probably a bit less concentrated, I am checking this). 3. Measured the pH of the solution at different temperatures to determine...

I have two acids in this solution (H2SO4 and HOCl), and want to find out how many of the hydrogen ions detected by the pH metre were contributed by the dissociation of HOCl. I am testing at different temepratures, so can't use standard ka. Do you have any suggestions? I was subtracting the total...

Basically what happened is we added approximately 10mL 1.8M sulfuric acid, and the pH was 0.71. This suggests that the [H+] concentration is at least 1.95M. Where did the additional H+ ions go?

Hi Everyone, I was just wondering if you know of any factors that would affect the dissociation of a strong acid. I know that weak acids are affected by factors such as the common ion effect and temperature, but would this apply to strong acids as well? I only ask because we added...

I think I still need to process everything you just said! I'll go away and see what I come up with, and do you mind if I come back with any more questions? Thankyou so much for all your assistance and dedication though, it is really greatly appreciated!

I don't really have access to the book. However, I really appreciate all your effort, and look forward to hearing your thoughts!