Laboratory Report Sheetexperiment

1. Fill-out the following table with your results in the qualitative experiments. Interpret your observations. See for example the results from Vial D.

Qualitative results

Effect

BaC03

Major discoloration,

Bubbling,

precipitate,

Reaction vial

yes or no

yes or no

yes or no

A/ Blank

B/ Fe2+ alone

C/ H202 alone

D/H202 + Mn2+

NO

YES

NO

E/H202 + Fe2+

F/ UV alone

G/ H202 + UV

Interpret each one of your results:

Vial G:

2. Insert your absorbance vs wavelength spectra for all the samples. Estimate the percentage of the absorbance reduction observed in each sample at the maximum-absorbance wavelength (fill-in the following table). Interpret your observations.

500 600

Wavelength

Sample in Vial

Absorbance

Absorbance decrease, %

A

B

C

D

E

F

G

0 0

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