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Which characteristic defines the main difference between a basic buffer system and an acidic buffer system?
if a sodium hydroxide solution were added to a solution containing leadii ions sodium ions nickelii ions and potassium
a flask contains 0.350 grams of liquid br bromine . calculate the number of brbromine molecules present in the flaska
How many moles of oxygen will be produced if 27.6 grams of Al are produced?
What is the molar mass of a nonelectrolyte compound if 3.42 grams of the compound dissolved in 41.8 grams benzene begins to freeze
nitric acid is usually purchased in concentrated form with a 70.3% HNO3 concentration by mass and a density of 1.14% g/ml. How much of the concentrated stock solution in milliliters should you use to make 2.5L of 0.500 M HNO3.
A solution is prepared by dissolving 13.4 g ammonium sulfate in enough water to make 133.0 mL of stock solution. A 11.90 mL sample of this stock solution is added to 52.50 mL of water. Calculate the concentration of ammonium ions and sulfate ions ..
The rate constant for the reaction 2A ? 2B + C is 1.72 M -1min-1. Find the time, in seconds, needed to decrease the concentration of A from2.45 M to 1.22 M.
What is the pH of 30.00 mL of 3.45x10¡7 M 2-Oxopropanoic acid. (Note: any higher order polynomials must be reduced to at least a quadratic.)
Calibration standards.Transfer 1.00, 5.00, 10.00, 15.00 and 20.00 mL aliquots of 10ppm F- solution to 100 mL flasks. Add 50 mL of TISAB containing CDTA to each
Give explanation for arrangements how you decide the boiling points comparison - Arrange all these compounds in order of increasing boiling points
For example if your compound is water and you have the information the boiling point, Tb=(99.98 C), the enthalpy of vaporization= (40.65 kJ/mol) and the molar mass= 18.02g/mol.
65.50 mL of 0.161 M HF is titrated with 0.1200 M NaOH. What is the pH at the equivalence point.
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