Search found 6 matches
- Wed Feb 04, 2015 8:58 pm
- Forum: Work, Gibbs Free Energy, Cell (Redox) Potentials
- Topic: What to use for n in -nFE?
- Replies: 2
- Views: 1695
What to use for n in -nFE?
How would I know what to use as n for Gibbs free energy=-nFE? Which amount of moles would I use if there are different coefficients for each compound in a reaction?
- Tue Jan 13, 2015 5:40 pm
- Forum: Thermodynamic Systems (Open, Closed, Isolated)
- Topic: system undergoing change at constant temp(#7.15)
- Replies: 1
- Views: 996
system undergoing change at constant temp(#7.15)
(Number 15 for Ch 7 HW) Each of the pictures below shows a molecular view of a system undergoing a change at constant temperature. In each case, indicate whether heat is absorbed or given off by the system, whether expansion work is done on or by the system, and predict signs of q and w for the proc...
- Thu Dec 11, 2014 4:32 pm
- Forum: *Making Buffers & Calculating Buffer pH (Henderson-Hasselbalch Equation)
- Topic: Calculating pH and pH change in a buffer solution (12.11)
- Replies: 4
- Views: 2014
Re: Calculating pH and pH change in a buffer solution (12.11
CH3COOH Ka=1.8x10^-5
- Thu Dec 11, 2014 4:29 pm
- Forum: *Titrations & Titration Calculations
- Topic: Concentration of SO2 in the air in ppm (12.97c)
- Replies: 1
- Views: 7993
Concentration of SO2 in the air in ppm (12.97c)
In an attempt to determine the concentration of sulfur dioxide in the air near a power plant, two students set up a bubbler that passes air through 50 ml of 1.0x10^-4 M NaOH. The temperature is 22 C, and the atmospheric pressure 753 torr. The air is pumped for 2.5 hr at a flow rate of 3.0 L.h^-1. Th...
- Wed Dec 10, 2014 8:45 pm
- Forum: *Making Buffers & Calculating Buffer pH (Henderson-Hasselbalch Equation)
- Topic: Calculating pH and pH change in a buffer solution (12.11)
- Replies: 4
- Views: 2014
Calculating pH and pH change in a buffer solution (12.11)
A buffer solution of volume 100.0 ml is 0.100 M CH3COOH and 0.100 M NaCH3CO2. a) What are the pH and pH change resulting from the addition of 10.0 ml of 0.950 M NaOH to the buffer solution? b) What are the pH and pH change resulting from the addition of 20.0 ml of 0.100 M HNO3 to the initial buffer ...
- Sat Oct 25, 2014 9:18 pm
- Forum: Ionic & Covalent Bonds
- Topic: Most likely charge for ions
- Replies: 4
- Views: 15960
Most likely charge for ions
How would I know the most likely charge for ions formed by elements such as S, Rb, Ga, etc.?