# 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?

I figured out what I was doing wrong! I have the right answer! Yay!