Groups A & B –
Working Together:
1. Record Data from other Group.
2. At the appropriate wavelength (determined in Part A):
a. Zero the spectrophotometer.
b. Place the
cuvette with the 0.5M HNO3 in the holder
and adjust the light control knob to 100%.
Remove the cuvette.
c. Place the
cuvette with the solution in the holder.
d. Record
the % Transmittance on Datasheet 1.
e. Pour the
solution out of the cuvette back into the
beaker of ÒDiluted Fe3+ Ó.
3. Pipet another 5.00 ml of KSCN into the beaker
of ÒDiluted Fe3+ Ó. Stir well.
4. Pour ~8 ml of solution into a cuvette.
5. Place the cuvette with the solution in the holder.
6. Record the % Transmittance on Datasheet 1.
7. Pour the solution out of the cuvette back
into the beaker of ÒDiluted Fe3+ Ó.
8. Repeat steps 14-18 to obtain the remaining data.