The freezing point of the two solutions are lower
than that of pure water. This is because the
solutions contain the salt ions, which makes it
more difficult for the water molecules to slow
down enough to reach a freezing point.
Calculations for D.O. (R.W.)
We found that it took 25.3 ml of Na2S2O3
to titrate the rain water solution.
Using the following series of equations we
also found that 1mole O2(2mol
MnO2/1MolO2)(1Mol I2/1Mol MnO2)(2Mol
S2O3^2-/1 Mol I2)= 4mol S2O3^2I. 2Mn2+
Each group will be called to discuss one of the questions
below, however you must prepare for all of them, as the
selection will be random. Optimally, you should work with
your group in preparation and consult your laboratory
December 2, 2011
Dissolved Oxygen and Chloride titration
To determine the amount of dissolved oxygen in two samples of water using a redox
reaction titration. To determine the amount of chloride ions in two sample o
November 22, 2011
How many milliliters of ethylenediaminetetra (EDTA) will be necessary for the formation
of stable one-to-one complexes of water?
Goggles should be worn during all experiments t