Airin

How would you calculate the pH of the buffer if 1.0mL of 5.0M NaOH is added to 20.0mL of this buffer? Can someone please explain to me how to do B and C step by step so I could understand it clearly? :) Say, for example, that you had prepared a buffer in...

How would you exactly start the first problem? My thermodynamic skills is a bit rusty. I am assuming I have to use ΔH°f under the given reaction..? But then..we barely covered ΔG° in class. Am I to use this equation, ΔG° = ΔH° - T ΔS°? Umm..can someone ex...

How do you find the concentration of[OH-]? :C

Would it be pOH = 14 - pH Then, [OH-] = 10^-pOH After finding [OH-] find the mol ratio?

Oh right, the parent acid was H3PO4. In part A, when calculating the pH, what exactly is pKa2? I am still unsure how to find the Ka/Kb on the tables of Ka's and Kb's. In part B, you mentioned that in 20 mL I will have 0.145 mol base and 0.02 mol acid. The...

For part C, I just wanted to make sure if I did the calculations correctly when taking the anti-log. 7.07 = 7.21 + log (0.7256-x)/(0.1+x) -0.14 = log (0.7256-x)/(0.1+x) 10^-0.14 = (0.7256-x)/(0.1+x) (10^-0.14)(0.1+x) = (0.7256-x) x = 0.9018 mol HCl M of H...

I found out that Molarity of HCl was 0.5 M. So then, 0.5 M HCl = 0.9018 mol HCl/ L HCl L HCl = (0.9018 mol/0.5 M) HCl = 1.8036 L x 1000 mL/1 L) = 1803.6 mL = 1800 mL HCl

Thank you DrBob22. :) But for #1, am I looking for dGo for H2(g)?

Or calculate dHo and dSo at standard enthalpies of formation and entropies?