Wednesday
July 30, 2014

Posts by amanda1012


Total # Posts: 18

Chemistry
Zn|ZnCl2(0.00165 M)||CuSO4(0.0125 M)|Cu Find Ecell taking activities into account.

Chemistry
Oh I was doing 1:2 ratio instead of 1:1... That is where I went wrong! When I recalculated it with 1:1 I got 0.066628 M

Chemistry
A solution of the primary standard potassium hydrogen phthalate, KHC8H4O4, was prepared by dissolving 0.4877 g of potassium hydrogen phthalate in about 50 mL of water. Titration with a KOH solution required 36.21 mL to reach a phenolphthalein end point. What is the molarity of...

Chemistry
Given a diprotic acid, H2A, with two ionization constants of Ka1 = 4.5× 10–2 and Ka2 = 5.2× 10–7. Calculate the pH and molar concentration of each protonated form for a 0.133 M solution of NaHA. Calculate the pH and molar concentration of each protonated ...

Chemistry
Thank you!

Chemistry
My biggest problem is knowing where to start. So I calculate the ionic strength then the activity coefficients. Then do I just "plug and chug"

Chemistry
Use activity coefficients to find the concentration of hydrogen ions in a solution of 70.0 mM butanoic acid and 0.1 M NaCl. The ionization constant of butanoic acid is Ka = 1.52 × 10-5. Take the size of C3H7COO– to be 500 pm.

Chemistry
Oh, ok! I was over thinking the problem!!! Plus a fever may not help with my problem solving abilities... Thank you!

Chemistry
The Ka of a monoprotic weak acid is 3.39 × 10-3. What is the percent ionization of a 0.125 M solution of this acid? I just do not know where to even start...

chemistry
Determine the pH of a solution containing 0.045 M NaOH and 0.025 M KI: With activities: Without activities:

Physics
That is what I was thinking. I just was not sure if firing the object made a difference.

Physics
What is the acceleration of a projectile fired vertically upwards? Is it positive or negative? Vertically downwards?

Chemistry - Please help!
I figured out what I was doing wrong! I have the right answer! Yay!

Chemistry - Please help!
I am doing something wrong in my calculations. For ?M I have 0.24 My equation is: 2.8*10^(-18) = (3x)^3 * (x+0.24)

Chemistry - Please help!
Thank you so much!!!

Chemistry - Please help!
What is the silver ion concentration in a solution prepared by mixing 433 mL of 0.356 M silver nitrate with 467 mL of 0.574 M sodium phosphate? The Ksp of silver phosphate is 2.8 × 10^-18

Chemistry
I figured it out. I had to use a ΔG° from a previous problem.

Chemistry
What is ΔG at body temperature (37.0° C) if the concentration of A is 1.7 M and the concentration of B is 0.50 M?

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