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Chromic acid is a diprotic acid H2CrO4 with Ka1 = 0.18 and Ka2 = 3.2 x 10-7. A solution of potassium chromate is prepared at pH 5.43. Calculate the fraction of the total chromate in this solution that is present as the chromate ion CrO42-.
Describe and explain the possible effect on your results of the following experimental errors or variations. (a) You stopped the steam distillation after collecting 3 mL of distillate
Explain how the transition from the enamine intermediate to the imine intermediate in the Fischer indole synthesis of 2-phenylindole
What is the heat capacity of an empty glass mug weighing 300.0 g, and what quantity of heat is required to heat it from 25 oC to 75 oC?
173.3 g of NaCl completely dissolves (producting NA+ and Cl- ions) in 1.00 kg of water at 25.0 degrees celcius. the vapor pressure of pure water at this temperature is 23.8 torr. Determine the vapor pressure of the solution. A)19.3 torr B)23.8 tor..
A 1.70-g sample of a large biomolecule was dissolved in 11.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85°C. Calculate the molar mass of the biomolecule.
What type of chemical reactions is used to liberate energy from the fuel in the form of heat? What are the products of the reactions? Write a representative reaction equation.
Suppose you have a copper nitrate solid. You are not sure, however, if the solid is copper (I) nitrate, CuNO3, or copper (II) nitrate, Cu(NO3)2. You dissolve a 0.1015 gram sample of this solid in water and nitric acid and then dilute it to a final..
What solute particles are present in an aqueous solution of NH4Cl? Express your answer as a chemical formula. If there is more than one answer, separate them by a comma. Include charges where necessary.
A CONTAINER HOLDS 7.62L OF N2O(g) at 4.06atm in equilibrium at 25C with 5.82L of an aqueous solution of N2O(aq).
1.90-g sample of a large biomolecule was dissolved in 23.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85°C. Calculate the molar mass of the biomolecule.
A fishing boat accidentally spills 15.0 barrels of diesel oil into the ocean. Each barrel contains 42 gallons. If the oil film on the ocean is 2.5 x 10^2 nm thick, how many square meters will the oil slick cover? Assume that the oil slick forms a ..
Determine the concentrations of K2SO4, K , and SO42- in a solution prepared by dissolving 2.11 × 10-4 g K2SO4 in 2.00 L of water. Express all three concentrations in molarity.
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