Question

What pH is needed to produce this value of Q if the concentration and pressure values are. Q= 1.38*10^-26
Br2=2.50*10^-4M
Br-=12.10M
SO4^2-=8.75M
Pso2=1.50*10^-5

Answer 1

You must have an equation (or an expression) and H^+ must be included.

Answer 2

We had to calculate H^+ concentration using Q which was 2.7x10^-27
The concentration I got was 6040M H^+ but if you look at the pH for that it is a negative value...
SO4^2-(aq)+4H^+(aq)+2Br^-(aq) -> Br2(aq)+SO2(g)+2H2O(l)
That is the full balanced equation for the question.

Answer 3

I have the same issuee The H^+ concentration is 3685 on my example, however when i enter -log[H+] I get a negative numbe which isn't the pH :(

Answer 4

Waait, The answer should be a negative number because that just means that the concentration is TOO high! pH is the negative log of the hydrogen ion concentration. Recall that pH can be negative when the hydrogen ion concentration is very high.

So, Since your [H+]= 6040 M
-log[6040]=
-3.78 = pH
:D

Answer 5

Yes it should be negative because i got an negative and it gave me this response. Although negative values are possible for concentrated acids, this is too low to make the reaction practical in a laboratory. Using a more oxidizing acid, such as nitric acid, would be a more efficient way to produce bromine from bromide ions.