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Procedure A: Water Dilution
SAFETY REFERENCE CHEMICAL DISPOSAL PROCEDURES
1a
Wear chemical splash goggles, chemical-resistant gloves and a lab coat or
chemical-resistant apron.
1b
Perform this procedure in a fume hood. Wear chemical splash goggles, chemicalresistant
gloves and a lab coat or chemical-resistant apron.
5b
Flush the neutral solution down the drain with excess water.
3a
When the mixture is uniform, flush it down the drain with large amounts of extra
water.
7a
Flush the neutral solution down the drain with excess water.
Procedure B: Reduction
Flinn Method #22a, continued
2a
Hydrogen perox ide of any
concentration may be disposed
of by pouring it into a large beaker
containing at least a tenfold excess of
water. Stir constantly.
H2O2
H2O
2b
If you are dealing with solid sodium
peroxide, carefully add a small amount
of water and break up any lumps with
a plastic stirring rod. Do not grind
dry solid.
5a
Pour the material slowly with
continuous stirring into a large beaker
of water. Oxygen gas will evolve, and
the solution will become strongly
basic. The final amount of sodium
peroxide in the water should be no
more than 5%. (If you have more
sodium peroxide than will fit into this
concentration in your beaker, do the
procedure again until all the material
is disposed of.)
Na2O2
H2O
6a
Using pH paper as a monitor, neutralize
the solution with 3 M hydrochloric
acid.
pH Paper
3 M HCl
4a
If you are dealing with sodium
peroxide, carefully add a small amount
of water and break up any lumps with
a plastic stirring rod.
3b
Slowly add the sodium peroxide into
a large beaker containing 1 M sodium
metabisulfite
(100 mL per g of Na2O2),
and stir continuously.
Na2O2
1 M Na2S2O5
4b
Using pH paper as a monitor, neutralize
the solution with 3 M hydrochloric acid.
pH Paper
3 M HCl
Please… Read the Narratives
Important narratives precede these specific chemical disposal methods!
Please read each narrative carefully! Do not use these procedures if you are
not comfortable with the chemistry. Do not use these procedures without
first consulting with your local government regulatory
officials. These
procedures may not be used in some jurisdictions. All procedures involve
some hazards and risks. Once again… read the narratives that precede
these specific chemical disposal methods.
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