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What is the precipitate which forms and then redissolves upon adding H2SO4 to the mixture of K+, [Al(H2O)2(OH)4]- and OH-?
Calculate the volume of 6.0 M sulfuric acid H2SO4 solution required to neutralize the excess potassium hydroxide, KOH, solution from the first step of the synthesis. Indicate clearly your calculations and reasoning.
Calculate the theoretical yield of the precipitate in a.Assume that you started with 1.00g of Al(s) and could produce and collect the precipitate quantitatively. Indicate clearly your calculations and reasoning.
Calculate the percent yield if you actually recovered 2.64g of dried precipitation.
If 18mL of oxygen are collected over water at 27 degrees Celcius and 740 mm Hg of pressure, what volume will the dry gas have at STP?(The vapor pressure of water at 27 degrees celcius is 26.7 mm Hg)
What mass of O2 is required for the complete combustion of 68.9 g of pentane, C5H12, to CO2 and H2O?
explain Why this separation occur and which solvent will be on top - the temperature of twenty degree Celsius. When hexane is added with H 2 O, there is a separation
calculate the micrograms (to the nearest microgram) of iodine per serving in the finished product. Show your work.
Calculate the pH of this solution? if we want to lower the pH by one unit of this solution then How many mL of 0.1 M H 3 PO 4 should be added to this solution?
Calculate the net charge of Aspartic Acid. Its given that Aspartic acid has a pK1 COOH at 1.99 and also a pK2 NH3 group at 9.90
An aqueous solution that contains 285ppm of potassium nitrate (KNO3) is being used to feed plants in a garden. What volume of this solution is needed.
If 12.5 g of magnesium nitride is treated with water, what volume of ammonia gas would be collected at 28°C and 753 mm Hg?
A mass of 2.50 g of hydrated copper(II) sulfate is placed in a crucible and heated. On heating, 1.59 g of white anhydrous copper(II) sulfate is left behind. Determine the ratio of water to copper(II) sulfate.
Supppose that a 2 L solution is made from 178 mg of citric acid (C6H8O7). What is the molar mass of C6H8O7
At equilibrium the pressure of NH3 (g) is 1.23 atm. NH4Cl (s) ---> NH3 (g) + HCl (g) Find the equilibrium constant Ka for the reaction
A solution is prepared by adding 1.10 g of solid NaCl to 50.0 mL of 0.100 M CaCl_2. What is the molarity of chloride ion in the final solution? Assume that the volume of the final solution is 50.0 mL.
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