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You add an excess of Ca(OH)2 to water maintained at a particular temperature, stir until the solution is saturated, filter, then determine the [OH?] in the solution by titration with acid. Titration of 25 mL of the calcium hydroxide solution to the endpoint requires 12.15 mL of 0.070M HCl solution. a) What is the millimolar quantiy of OH? in the 25 mL of solution? b) What are the concentrations of Ca2+ and OH?? c) What is the solubility of Ca(OH)2 under these conditions? (Expressed as g/dL). d) What is the Ksp for Ca(OH)2 under these conditions?
The freezing point of benzene is 5.5oC. What is the freezing point depression of a solution of 5.00 g naphthalene (C10H8) in 444 g benzene (Kf of benzene = 4.90oC/m)?
Cesium atoms are the largest naturally occurring atoms. The radius of a Cs atom is 2.62angstroms. How many Cs atoms would have to be laid side by side to give a row of Cs atoms
What are the most important energy considerations which determine whether or not this compound can be prepared?
Ammonia can be made by reacting calcium cyanamide (CaCN2) with water as shown: CaCN2 + 3 H2O => CaCO3 + 2 NH3. How many grams of calcium cyanamide are required to react with 190.0 g of water
a) when 34.0g of NH3 reacts with 96.0g of O2 what is the partial pressure of NO in the sealed container?
A nurse administered 3.50 mL of a radioisotope solution that has an activity of 135 Ci/mL. What total dose of the radioisotope did the patient receive
also why are the energy minimization bond angles not the same as the ideal bond angles?
A proton in a linear accelerator has a de Broglie wavelength of 144 rm pm. what is the speed of the proton?
Identify which of the following solutions may act as buffers by placing a check in the box next to the mixture. A. HNO3 , NaNO3 D. H2SO4, NaHSO4
Calculate the pH of each of the following solutions. (a) 0.115 M HONH2 (Kb = 1.1 10-8) (b) 0.115 M HONH3Cl
What amount of the ultimate carbonaceous BOD is remaining after this time?
When determining the pressure of dry hydrogen gas, explain how the measured atmospheric pressure is corrected for the presence
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