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Preparation of Base Solutions
Preparing Sodium Hydroxide Solution?
A great amount of heat is liberated when sodium hydroxide and water are mixed.
The temperature of the solution may rise very rapidly. In fact, the temperature may
rise so fast that the solution may boil and possibly spatter a hot, caustic solution.
Immerse the flask or beaker in an ice–water bath to control the solution temperature.
In addition, pay special attention to the condition of the beaker or flask, you use to
prepare these solutions. If you use a glass vessel it must be borosilicate glass and
it must be free of any scratches, chips or breaks. Inspect the vessel carefully before
use. Add ingredients slowly with continuous stirring.
Name / Formula / F.W. Concentration Amount/Liter§
Ammonium Hydroxide* 6 M 405 mL
NH4OH 3 M 203
F.W. 35.05 1 M 68
0.5 M 34
0.1 M 6.8
Potassium Hydroxide 6 M 337 g
KOH 3 M 168
F.W. 56.11 1 M 56
0.5 M 28
0.1 M 5.6
Sodium Hydroxide† 6 M 240 g
NaOH 3 M 120
F.W. 40.00 1 M 40
0.5 M 20
0.1 M 4.0
* Use concentrated (14.8 M) ammonium hydroxide.
† Exothermic reaction. Use high temperature (borosilicate) glassware.
§ The amount of solute required to prepare one liter of solution.
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