Tuesday
September 2, 2014

Posts by amanda1012


Total # Posts: 18

Chemistry
Zn|ZnCl2(0.00165 M)||CuSO4(0.0125 M)|Cu Find Ecell taking activities into account.
October 14, 2012

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
October 3, 2012

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...
October 3, 2012

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 ...
October 2, 2012

Chemistry
Thank you!
September 29, 2012

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"
September 29, 2012

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.
September 29, 2012

Chemistry
Oh, ok! I was over thinking the problem!!! Plus a fever may not help with my problem solving abilities... Thank you!
September 29, 2012

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...
September 29, 2012

chemistry
Determine the pH of a solution containing 0.045 M NaOH and 0.025 M KI: With activities: Without activities:
September 28, 2012

Physics
That is what I was thinking. I just was not sure if firing the object made a difference.
September 25, 2012

Physics
What is the acceleration of a projectile fired vertically upwards? Is it positive or negative? Vertically downwards?
September 25, 2012

Chemistry - Please help!
I figured out what I was doing wrong! I have the right answer! Yay!
September 8, 2012

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)
September 8, 2012

Chemistry - Please help!
Thank you so much!!!
September 8, 2012

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
September 8, 2012

Chemistry
I figured it out. I had to use a ΔG° from a previous problem.
September 8, 2012

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?
September 8, 2012

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