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A sample solution is to be analyzed for [Cu+2]. Three 5.0 mL aliquots are removed: to aliquot No.1 is added nothing; to No.2 is added 5?L of 100 ppm Cu+2, and to No.3 is added 10?L of 100 ppm Cu+2. (Assume negligible aliquot volume change). Signal responses for Cu+2 were: No. 1 = 0.200 units; No. 2 = 0.315 units; No.3 = 0.430 units. What is the [Cu+2] of the sample solution in ppm?
The pH would decrease slightly. The pH would decrease dramatically. The pH would increase slightly. The pH would increase dramatically. The pH would not change at all.
Atrazine is an herbicide widely used for corn and is a common groundwater pollutant in the corn-producing regions of the United States. The log Kow for atrazine is 2.65.
Calculate the heat released when 1.95 L of Cl2(g) with a density of 1.88 g/L reacts with an excess of sodium metal at 25°C and 1 atm to form sodium chloride.
Which of the following is NOT typical of most organic compounds?
How many grams of water should be produced and What is the theoretical yield of nitrogen?
the beaker and its contents have a total mass of 289.85 g. What volume does the beaker hold? Use ? =1.00 g/mL as the density of water. b) How much would the beaker and its contents weigh if it was completely filled with mercury? The density of mer..
Diethylamine, (C2H5)2NH, is a weak base (pKb=3.16 at 25oC). What is the pH of 0.155 mol/L (C2H5)2NH(aq) at 25oC
Which carbons release during the first turn of the TCA cycle. And then second turn of the cycle. Details and structures would be very helpful.
What are the pH, pOH, hydroxide ion concentration , and hydronium ion concentration of a 0.014M strontium hydroxide solution
A beaker contains 250 mL of .0150 M silver ion. To this beaker is added 250 mL of .300 M bromide ion. What is the concentration of Ag+ in the final solution. Ksp for AgBr = 5.0 x 10^-13
Oxygen at 25 degrees C and a pressure of 1000 torr. At STP 1 mol of gas occupies 22.4 L What is the volume in liters of the oxygen gas in the cylinder?
What is the formula for the compound formed between germanium with a valency of (IV) and iodine? a. Ge4I2 b. Ge2I4 c. GeI4 d. GeI2
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