ammonium bicarbonate buffer
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Ammonium acetate is a chemical compound with the formula CH3COONH4 (or C2H4O2.NH3 or C2H7NO2). It is a white solid, which can be derived from the reaction of ammonia and acetic acid. It is available commercially and, depending on grade, can be rather inexpensive.
Uses and distinctive properties
- NH4C2H3O2 is occasionally employed as a biodegradable de-icing agent.
- It is often used with acetic acid to create a buffer solution, one that can be thermally decomposed to non-ionic products
- Ammonium acetate is useful in the Knoevenagel condensation in organic synthesis.
- It is relatively unusual example of a salt that melts at low temperatures.
- Can be used with distilled water to make a protein precipitating reagent.
- Is often used as an aqueous buffer for ESImass spectrometry of proteins and other molecules.
Ammonium acetate is volatile at low pressures. Because of this it has been used to replace cell buffers with non-volatile salts, in preparing samples for mass spectrometry. It is also popular as a buffer for mobile phases for HPLC with ELSD detection for this reason. Other volatile salts which have been used for this include ammonium formate.
CH3COONH4 is hygroscopic. It decomposes easily at elevated temperatures into acetamide.
- CH3COONH4â†’ CH3C(O)NH2 + H2O
In this reaction, a salt is converted to two molecular species, which is a relatively uncommon conversion at mild temperatures.
From Yahoo Answers
Answers:Above 60 degrees C, sodium bicarbonate decomposes into sodium carbonate, water, and carbon dioxide. The yield is two moles of gas per mole of sodium bicarbonate. Above 36 degrees C ammonium bicarbonate decomposes into ammonia, water, and carbon dioxide, three moles of gas per mole of ammonium bicarbonate, and this reaction leaves no salt residue. From this it seems that ammonium bicarbonate has more rising power than sodium bicarbonate has. Avoidance of sodium is another advantage. These advantages of ammonium bicarbonate for baking may be outweighed by production of acrylamide, a toxin.
Answers:(NH4)2Cr2O7 and NH4OH buffer.
Answers:Think about the question- When a large amount of acid is added, what happens to the pH? The pH decreases (1 = very acid, 7 = neutral, and 14 = very basic). That means the answer can be B or D When a stress is put on an equilibrium reaction, the reaction shifts to relieve the stress. Adding a large amount of H3O+ to the right side of the reaction equilibrium will cause the equilibrium to shift to the left. The correct answer is B.