Number of results: 97,328
At what wavelengths do Cr(III) ions absorb the maximum amounts of light? Look at your color wheel. What color is Cr(III)? It will absorb the complement of its color. You may have a graph of absorbance vs wavelength for Cr(III). If so, the maximum absorbance (in th visible ...
Monday, October 16, 2006 at 7:10pm by Anonymous
chemistry- absorbance & transmittance
An unknown was prepared with the concentration of 0.000120 M. A Beer's Law plot was prepared using the absorbance values from standard solutions of ASA and a line drawn through all the points passed through the origin with a slope of 1750.0 M–1. The expected absorbance and %T ...
Friday, February 16, 2007 at 1:00pm by christine
Would the following errors cause an increase or decrease in absorbance and % Transmittance? insoluble particles were accidentally pipetted into the cuvette with the solution the cuvette was wet and not prerinsed with the solution. fingerprints were not wiped off the outside of...
Thursday, May 10, 2007 at 10:04pm by jared
An unknown was prepared with the concentration of 0.000331 M. A Beer's Law plot was prepared using the absorbance values from standard solutions of ASA and a line drawn through all the points passed through the origin with a slope of 1646.3 M–1 . The expected absorbance and %T...
Monday, May 14, 2007 at 3:08am by jared
1. Why Beer's law is expressed in terms of absorbance instead of transmittance? 2. What is the significance of spectral scanning? 3. What is the importance of the baseline?
Friday, September 14, 2007 at 7:33am by smiley
By the way, you MAY subract absorbance from absorbance. Some preprinted graph papers as well as some spectrophotometers are calibrated in percent transmittance and you may NOT subtract percent T values. They must first be converted to A valures through log 1/T, then may be ...
Friday, September 14, 2007 at 7:33am by DrBob222
Absorbance = slope*molarity will get A for you. Then A = log (1/T) for transmittance. T*100 = %T.
Saturday, January 26, 2008 at 3:26pm by DrBob222
I answered this just a few posts back but the molarity was different. Absorbance = slope x C will get A. Then A = log (1/T) will get transmittance. transmittance x 100 = %T.
Saturday, January 26, 2008 at 11:15pm by drbob222
Ignore my previous answer. I was using the transmittance equation instead of absorbance. I should have known better. Absorbance = 1 - e^-kX If absorbance = 0.50, kX = 0.6931 If absorbance = 0.31, e^-kX = 0.69 and kX = 0.3711 X is the path length which stays the same, so k ...
Friday, February 22, 2008 at 11:53am by drwls
1. decrease absorbance and decrease % transmittance 2. decrease absorbance and increase % transmittance 3. increase absorbance and decrease % transmittance 4. decrease absorbance and increase % transmittance
Thursday, May 10, 2007 at 10:04pm by Allison
Chemistry Suspension Examples...]
Monday, September 8, 2008 at 11:36pm by Chemistry Suspension Examples...]
Chemistry Suspension Examples...
Tuesday, September 9, 2008 at 2:47am by Chemistry Suspension Examples...
At what initial concentration would a solution of acetic acid (ka=1.8x10^-5) be 2% ionized? Thanks Responses Chemistry - DrBob222, Thursday, February 12, 2009 at 10:00pm Let's call acetic acid HAc. Then the ionization is HAc ==> H^+ + Ac^- We will call the initial concn of ...
Thursday, February 12, 2009 at 11:15pm by Chemistry - Repost for DrBob222
college chemistry-absorbance of an equilibrium mixture Problem: A student mixed 4.00mL of 1.02x10^(-1) M Fe(NO3)3 with 100.00mL of 1.98*10^(-4) M KSCN, using 5.0*10^(-1) M HNO3 as the solvent for both solutions, and found the absorbance of the resulting equilibrium mixture to ...
Saturday, March 14, 2009 at 1:35am by Mary
1.) Increase absorbance & decrease % transmittance all the other answer above are correct
Thursday, May 10, 2007 at 10:04pm by Randi
you can also order the UPCO's Physical Setting CHEMISTRY... it has many helpful equations and it will make it easier to study and understand evrything... plus the book is cheap too.
Monday, March 29, 2010 at 4:38pm by chemistry challenged
Absorbance = log (1/transmittance)
Tuesday, September 7, 2010 at 12:30pm by DrBob222
how do I plot absorbance vs concentration and transmittance %T vs concentration on the same graph??
Saturday, November 6, 2010 at 12:48pm by Vivian
i have a Chemistry lab (level 2) final exam soon. our teacher told us that we would have % transmittance problems, can someone show me an examples (maybe from an online test) or a made up one, of what i might expect to find on my chemistry lab final? like an examples of a % ...
Wednesday, December 1, 2010 at 4:53pm by jes
In dummy language, it is not linear because it is logarithmic by definition. absorbance=constant*concentration=kc which is linear with concentration. but absorbance=10*log P/Po= =10log 1/Transmittance because transmittance=P/Po which leads to T=e-k*concentration Thus, it is ...
Saturday, April 2, 2011 at 5:12pm by bobpursley