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1. The mass percentage of chloride ion in a 25.00-mL sample of seawater was determined by titrating the sample with silver nitrate, precipitating silver chloride. It took 42.58 mL of 0.2997 M silver nitrate solution to reach the equivalence point in the titration What is the mass percentage of chloride ion in the seawater if its density is 1.025 g/mL
2. The arsenic in a 1.22-g sample of a pesticide was converted to AsO43- by suitable chemical treatment. It was then titrated using Ag+ to form Ag3AsO4 as a precipitate.
(a) What is the oxidation state of As in AsO43- ?
(b) Name Ag3AsO4 by analogy to the corresponding compound containing phosphorus in place of arsenic.
(c) If it took 25.0 mL of 0.102 M Ag+ to reach the equivalence point in this titration, what is the mass percentage of arsenic in the pesticide?
If one added 0.01 M of CaCl2 to this solution, how many moles of Ca(OH)2 will now dissolve in 1.0 L of water containing this concentration of CaCl2
A 10.60 mL sample of sulfuric acid from an automobile battery requires 34.32 mL of 2.01 M sodium hydroxide solution for complete neutralization. What is the molarity of the sulfuric acid? Sulfuric acid contains two acidic hydrogens.
if the total amount of energy emitted by a carbon sample is 1.98x105 j determine the number of carbon atoms present in
Cyclopropane has significantly less angle strain than cyclopropane, yet is only slightly lower in energy. How can this be true? How does this information relate to the fact that cyclobutane is not a planar molecule
the discharge pressure is 2 bars. Determine the area, enthalpy and specific volume at the entrance of the nozzle and the area, enthalpy
Compounds containing carbon-carbon triple bond undergo the Diels-Alder reaction. Formulate the product formed by the reaction of
The molar heat capacity of silver is 25.35 J/mol * C. How much energy would it take to raise the temperature of 8.60 g of silver by 11.1 C?
Explain when a 1.150 g sample of iron ore is treated with 50.0 ml of HCL the iron dissolves in the acid to form a solution of FeCl3. The FeCl3 solution is diluted to 100.0 ml as well as the concentration of Fe3+ ions is determined by spectrometry ..
Estimate the weight load on a roof on lbs/ft^2 for 60 inches of snow. Assume that 10 inches of snow is equivalent to 1 inch of liquid water if melted. Liquid water is 62.4 pounds/cu-foot
At a particular temperature, N2O5 decomposes according to a first-order rate law with a half-life of 3.0 s. If the initial concentration of N2O5 is 1.0 × 1016 molecules/cm3, what will be the concentration in molecules/cm3 after 11.3 s?
What is the concentration of iron in the steel sample? Express your answer as grams of Fe per grams of steel (g Fe2 / g steel).
It takes 16.6 min for a 10.0-mL sample of an unknown gas to effuse through a pinhole. A 10.0-mL sample of helium, He, required 5.00 min. What is the molecular weight of the unknown gas
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