A Manual of Quantitative Chemical Analysis
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35. Copper.
Dissolve 4.9 grams of the pure copper sulfate in water and make up to 200 c.c. Place 50 c.c. of this solution in a platinum dish, the weight of which is accurately known. The negative pole of the battery is then connected with the dish, and the positive pole is connected with a coiled spiral of platinum wire that just dips into the solution, but does not touch the dish. Continue the process until all of the Cu is deposited and no reaction is shown with a freshly prepared solution of... potassium ferrocyanid. For the successful precipitation of Cu a weak current is neces- 52 QUANTITATIVE CHEMICAL ANALYSIS.
sary. A strong current deposits the Cu in a spongy condition. The deposited copper should then be washed carefully with hot distilled water, then with alcohol, dried, and weighed. (The 50 c.c. above contain exactly .25 gram of Cu.) 36. Nickel.
Dissolve 3.586 grams of pure nickel sulfate in dis- tilled water and make up to 200 c.c. Place 50 c.c.
of the solution in a platinum dish carefully weighed, and add NH^OH to strong alkalinity.
What to read after A Manual of Quantitative Chemical Analysis?
You can find similar books in the "Read Also" column, or choose other free books by Ladd, Edwin Fremont, 1859-1925 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
35. Copper.
Dissolve 4.9 grams of the pure copper sulfate in water and make up to 200 c.c. Place 50 c.c. of this solution in a platinum dish, the weight of which is accurately known. The negative pole of the battery is then connected with the dish, and the positive pole is connected with a coiled spiral of platinum wire that just dips into the solution, but does not touch the dish. Continue the process until all of the Cu is deposited and no reaction is shown with a freshly prepared solution of... potassium ferrocyanid. For the successful precipitation of Cu a weak current is neces- 52 QUANTITATIVE CHEMICAL ANALYSIS.
sary. A strong current deposits the Cu in a spongy condition. The deposited copper should then be washed carefully with hot distilled water, then with alcohol, dried, and weighed. (The 50 c.c. above contain exactly .25 gram of Cu.) 36. Nickel.
Dissolve 3.586 grams of pure nickel sulfate in dis- tilled water and make up to 200 c.c. Place 50 c.c.
of the solution in a platinum dish carefully weighed, and add NH^OH to strong alkalinity.
What to read after A Manual of Quantitative Chemical Analysis?
You can find similar books in the "Read Also" column, or choose other free books by Ladd, Edwin Fremont, 1859-1925 to read onlineMoreLess
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