Page 217 - Demo

“Your Safer Source for Science” Preparation of Base Solutions Preparation of Base Solutions
215
Name / Formula / F.W.
Ammonium Hydroxide* NH4OH
F.W. 35.05
Potassium Hydroxide
KOH
F.W. 56.11
Sodium Hydroxide† NaOH
F.W. 40.00
Concentration
6 M 3 M 1 M
0.5 M 0.1 M
6M 3 M 1 M
0.5 M 0.1 M
6M 3 M 1 M
0.5 M 0.1 M
Amount/Liter§
405 mL 203 68 34 6.8
337 g 168 56 28 5.6
240 g 120 40 20 4.0
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.
*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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