Laboratory Manual to Accompany Clarke And Denniss Elementary Chemistry
Laboratory Manual to Accompany Clarke And Denniss Elementary Chemistry
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To quickly assess the difficulty of the text, read a short excerpt:
What results, and what is formed ?
188 CHROMIUM Experiment 101 Add ammonium hydroxide to a solution of a chromium salt.
What is the color of the precipitate which forms, and what is its composition ? What change in its composition would result if it were highly heated ?
190 CHROMIUM Experiment 102 Mix 3 g. Of dry sodium carbonate with 3 g. Of powdered potassium nitrate. Place the mixture in a small crucible, FIG. 38 A.
r c: .. T.^ 3 -r 37C* FIG. 38.
cover it, and heat it on a triangle (Fig. 38)... until it fuses. Then add to the molten mass 1 g. Of powdered chromic oxide, and keep the whole in gentle fusion for three or four minutes. Allow it to cool.
What is now the color of the substance ?
Place the crucible in 30 cc. Of warm water, allow it to stand for some minutes, and then filter.
To what is the color of the filtrate due ?
Add dilute sulphuric acid until the solution has an acid reaction.
What change in color results ? What substance has been formed ?
Add ammonia until the solution is alkaline.
What to read after Laboratory Manual to Accompany Clarke And Denniss Elementary Chemistry?
You can find similar books in the "Read Also" column, or choose other free books by L M Louis Munroe Dennis to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
What results, and what is formed ?
188 CHROMIUM Experiment 101 Add ammonium hydroxide to a solution of a chromium salt.
What is the color of the precipitate which forms, and what is its composition ? What change in its composition would result if it were highly heated ?
190 CHROMIUM Experiment 102 Mix 3 g. Of dry sodium carbonate with 3 g. Of powdered potassium nitrate. Place the mixture in a small crucible, FIG. 38 A.
r c: .. T.^ 3 -r 37C* FIG. 38.
cover it, and heat it on a triangle (Fig. 38)... until it fuses. Then add to the molten mass 1 g. Of powdered chromic oxide, and keep the whole in gentle fusion for three or four minutes. Allow it to cool.
What is now the color of the substance ?
Place the crucible in 30 cc. Of warm water, allow it to stand for some minutes, and then filter.
To what is the color of the filtrate due ?
Add dilute sulphuric acid until the solution has an acid reaction.
What change in color results ? What substance has been formed ?
Add ammonia until the solution is alkaline.
What to read after Laboratory Manual to Accompany Clarke And Denniss Elementary Chemistry?
You can find similar books in the "Read Also" column, or choose other free books by L M Louis Munroe Dennis to read onlineMoreLess
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