The
Science Notebook
Lionel Chem-Lab
- Chapter 11
NOTE: This book was published in 1942 as a manual to
accompany several Lionel Chemistry sets of the time. While
some of the experiments and activities here may be safely
done as written, a number of them use chemicals and methods no
longer considered safe. In addition, much of the
information contained in this book about chemistry and other
subjects is outdated and some of it is inaccurate.
Therefore, this book is probably best appreciated for its
historical value rather than as a source for current information
and good experiments. If you try
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Pages 149 - 151
CHAPTER XI
FERROCYANIDES
Almost all of the ferrocyanides are colored
and this property is useful in chemical analysis. Most of the
metallic salts give precipitates of insoluble ferrocyanides. For
the following experiments, dissolve four or five sodium
ferrocyanide crystals in water and use the solution in the various
experiments as directed.
EXPERIMENT No. 318 Ferric Ferrocyanide
(CL-11, CL-22, CL-33, CL-44, CL-55, CL-66, CL-77)
APPARATUS: Test tube, ferric ammonium
sulfate, sodium ferrocyanide solution.
PROCEDURE:
Dissolve two measures of ferric ammonium sulfate in a test tube half
filled with water. Add a few drops of sodium ferrocyanide solution.
Note the deep blue precipitate.
SUMMARY:
Ferric ferrocyanide, the deep blue precipitate, is commonly called
Prussian blue.
EXPERIMENT No. 319 Ferrous Ferrocyanide
(CL-55, CL-66, CL-77)
Repeat Experiment No. 318 substituting ferrous ammonium sulfate for
ferric ammonium sulfate. The light blue precipitate will be ferrous
ferrocyanide.
EXPERIMENT No. 320 Copper Ferrocyanide
(CL-55, CL-66, CL-77)
Repeat Experiment No. 318 substituting copper sulfate for ferric
ammonium sulfate. The precipitate will be copper ferrocyanide.
EXPERIMENT No. 321 Decomposition Of Copper
Ferrocyanide
(CL-55, CL-66. CL-77)
APPARATUS:
Copper sulfate, sodium ferrocyanide solution, sodium carbonate,
calcium oxide, test tubes.
PROCEDURE:
Prepare a precipitate of copper ferrocyanide as described in the
previous experiment. Dissolve one measure of sodium carbonate in a
test tube half full of water. In another test tube, in the same
amount of water, dissolve one measure of calcium oxide. Mix the
solutions together and filter them through filter paper, col-
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FERROCYANIDES
lecting the filtrate in a clean test tube. Add the above filtrate to
the precipitate of copper ferrocyanide. Note how the precipitate
dissolves forming a blue-color solution. This blue solution is
copper hydroxide.
EXPERIMENT No. 322 Aluminum Ferrocyanide
(CL-33, CL-44, CL-55, CL-66, CL-77)
Repeat Experiment No. 318 substituting aluminum sulfate for ferric
ammonium sulfate. The light brown precipitate will be aluminum
ferrocyanide.
EXPERIMENT No. 323 Cobalt Ferrocyanide
(CL-33, CL-44, CL-55, CL-66, CL-77)
Repeat Experiment No. 318 substituting cobalt chloride for ferric
ammonium sulfate. The green precipitate will be cobalt ferrocyanide.
EXPERIMENT No. 324 Manganese Ferrocyanide
(CL-33, CL-44, CL-55, CL-66, CL-77)
Repeat Experiment No. 318 substituting manganese sulfate for ferric
ammonium sulfate. The white precipitate will be manganese
ferrocyanide.
EXPERIMENT No. 325 Zinc Ferrocyanide
(CL-44, CL-55, CL-66, CL-77)
Repeat Experiment No. 318 substituting zinc strip for ferric
ammonium sulfate. The white precipitate is zinc ferrocyanide.
EXPERIMENT No. 326 A Complex Salt Of Strontium
Ferrocyanide
(CL-77)
APPARATUS:
Strontium chloride, ammonium hydroxide, sodium ferrocyanide
solution, alcohol lamp or candle and test tubes.
PROCEDURE:
Dissolve one measure of strontium chloride in a test tube half full
of water. Add some sodium ferrocyanide solution. Add a few drops of
ammonium hydroxide. Heat solution to the boiling
point.
SUMMARY:
The cloudy precipitate is due to the complex salt which is formed.
EXPERIMENT No. 327 Nickel Ferrocyanide
(CL-66, CL-77)
Repeat Experiment No. 318 substituting nickel chloride for ferric
ammonium sulfate. The pale blue precipitate is nickel ferrocyanide.
EXPERIMENT No. 328 Another Way To Make Ferric
Ferrocyanide
(CL-66, CL-77)
Repeat Experiment No. 318 substituting ferric chloride for ferric
LIONEL
CHEM-LAB 151
ammonium sulfate. The precipitate will be ferric ferrocyanide or
Prussian blue.
EXPERIMENT No. 329 Calcium Ferrocyanide
(CL-33, CL-44, CL-55, CL-66)
APPARATUS: Calcium chloride, sodium
ferrocyanide, two test tubes, alcohol lamp or candle.
PROCEDURE:
Dissolve one measure of calcium chloride in a test tube half full of
water. Dissolve one measure of sodium ferrocyanide in another test
tube containing the same amount of water. Mix the two solutions and
heat to the boiling point. Allow test tube to cool.
SUMMARY:
The cloudy precipitate is calcium ferrocyanide.
"The Science Notebook"
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