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Airin
Questions and answers by visitors named
Airin
Questions (6)
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
5 answers
1,285 views
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
2 answers
1,003 views
Determination of Ksp, ΔG°, ΔH° and ΔS° for Ca(OH)2.
*** Need help on problem #3 & #4 *** CALCULATIONS: 1. Calculate the
3 answers
1,543 views
How would you start these problems?
...I suppose this is a continuation from this post: (replace the numbers with id=1395127807)
1 answer
1,048 views
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
6 answers
684 views
How would you solve these problems? I am confused about what it is asking and how to start it. A step by step process with
1 answer
639 views
Answers (7)
Or calculate dHo and dSo at standard enthalpies of formation and entropies?
Thank you DrBob22. :) But for #1, am I looking for dGo for H2(g)?
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
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
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
Would it be pOH = 14 - pH Then, [OH-] = 10^-pOH After finding [OH-] find the mol ratio?
How do you find the concentration of[OH-]? :C
