Explain what would happen to the color of a dilute solution containing FeCl_4^-, if you added a solution of sodium chloride, NaCl. Why is it unwise to boil the oxalate solution in preparation for its titration with permanganate? Describe how to make 2.5 L of 0.1 M HCl solution from 12...
What is the cation reaction with water, cation K_a, anion reaction with water, anion K_b, acidic base prediction, and pH of solution of sodium sulfate? What is the cation reaction with water, cation K_a, anion reaction with water, anion K_b,...
To function optimally, magnesium must be balanced in the body with calcium, phosphorus, potassium, and sodium chloride. If calcium intake is increased, magnesium should be increased also. Your doctor may alter this ratio, increasing your level of magnesium for a period of time. Toxicity due to...
Cells were loaded for the indicated periods at 0.2 μm free Ca2+ in the presence of 0.1 μm thapsigargin and 5 mm potassium oxalate. Results represent the mean ± S.E. of four experiments. B, Ca2+ dependence of 45Ca2+ uptake into COS-1 cells transfected with hSPCA2 or empty vector. ...
Why is it unwise to boil the oxalate solution in preparation for its titration with permanganate? Why does the element calcium react with water differently than magnesium, potassium and sodium, in a way that calcium looks opaque and cloudy in water and when phenolphthalein is added it looks brig...
Why is sodium acetate added in the preparation of the semicarbazone of benzalacetone? Why was Wohler's synthesis of urea significant to the field of carbon chemistry? Why should a magnesium ribbon be cleaned before burning it in air?
What is the cation reaction with water, cation Ka, anion reaction with water, anion Kb, acidic base prediction, and pH of solution of sodium sulfate? Salt Reaction With Water: When salt is added to water it dissolves in...
Niobium salts that may be mentioned include niobium chloride, potassium niobiate or sodium niobiate and most particularly herein niobium oxalate and niobium ammonium oxalate. This mixing is preferably performed at room temperature. The following steps (d2) and (e2) of the process consist in ...
The acidic solution was cooled to 0° C. and treated dropwise with an aqueous solution of sodium nitrite (15.46 g, 0.224 mol, 4 eq, 60 mL H2O). The solution was stirred at 0° C. for 2 hr. The reaction mixture was basified using saturated aqueous sodium bicarbonate (pH ca. 8). ...
Furthermore, the reaction can be conducted in the absence or presence of acid or base promoters. Suitable basic promoters include those heretofore known to promote the Michael condensation, including inorganic bases, for example, alkali metal hydroxides, such as sodium hydroxide or potassium hydroxide...