Synthetic Inorganic Chemistry a Laboratory Course for First Year College Stude
Synthetic Inorganic Chemistry a Laboratory Course for First Year College Stude
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When cool crack it up and dissolve it, together with what still adheres to the crucible, in boiling water. Filter the solution, and extract the residue with a little more boiling water and pour through the same filter. Add glacial acetic acid (cautiously) to the filtrate until it has become acid. Boil down the solution to 300 cc. , or to even a less volume if no solid salt begins to separate. Add 25 cc. More of glacial acetic acid, let stand for some time, and finally cool to o before separatin...g the crystal meal of potassium bichromate from the mother liquor. Purify the product by recrystallization.
Questions 1. Mention at least three oxidizing agents which might have been used instead of potassium nitrate in this preparation.
2. How might the oxidation of chromic hydroxide, Cr(OH) 8, be accomplished in the wet way? Experiment. To 5 cc. Of a cold solution of a chromic salt add about i gram of sodium peroxide, agitate for a few moments, and then warm until effervescence ceases. Formulate the equations for the intermediate reactions in such a way as to show the state of oxidation of chromium in each com- pound involved, and then add the separate equations to give one for the complete reaction.
What to read after Synthetic Inorganic Chemistry a Laboratory Course for First Year College Stude?
You can find similar books in the "Read Also" column, or choose other free books by Arthur a Arthur Alphonzo Blanchard to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
When cool crack it up and dissolve it, together with what still adheres to the crucible, in boiling water. Filter the solution, and extract the residue with a little more boiling water and pour through the same filter. Add glacial acetic acid (cautiously) to the filtrate until it has become acid. Boil down the solution to 300 cc. , or to even a less volume if no solid salt begins to separate. Add 25 cc. More of glacial acetic acid, let stand for some time, and finally cool to o before separatin...g the crystal meal of potassium bichromate from the mother liquor. Purify the product by recrystallization.
Questions 1. Mention at least three oxidizing agents which might have been used instead of potassium nitrate in this preparation.
2. How might the oxidation of chromic hydroxide, Cr(OH) 8, be accomplished in the wet way? Experiment. To 5 cc. Of a cold solution of a chromic salt add about i gram of sodium peroxide, agitate for a few moments, and then warm until effervescence ceases. Formulate the equations for the intermediate reactions in such a way as to show the state of oxidation of chromium in each com- pound involved, and then add the separate equations to give one for the complete reaction.
What to read after Synthetic Inorganic Chemistry a Laboratory Course for First Year College Stude?
You can find similar books in the "Read Also" column, or choose other free books by Arthur a Arthur Alphonzo Blanchard to read onlineMoreLess
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