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A 50.0 mL sample containing Cd2 and Mn2 was treated with 62.6 mL of 0.0600 M EDTA. Titration of the excess unreacted EDTA required 19.1 mL of 0.0330 M Ca2 . The Cd2 was displaced from EDTA by the addition of an excess of CN-. Titration of the newly freed EDTA required 23.5 mL of 0.0330 M Ca2 . What were the molarities of Cd2 and Mn2 in the original solution?
calculate the energy of a photon of light with a wavelength of 360nm.
Calculate the formula weight of CuSO4 . Use the following atomic weights: Cu is 63.5463 g/mol, S is 32.0666 g/mol, and O is 15.99943 g/mol. Your reported answer should have the correct number of significant figures and units.
The solubility of calcium carbonate (CaCO3) is 9.3 multiplied by 10-3 g/L. Calculate the solubility product of this compound.
Magnesium hydroxide is only very slightly soluble in water. The reaction by which it goes into solution is: Mg(OH)_2 (s) Mg^2+ (aq) +2 OH- (aq)
The [Br] of the resulting solution if 0.672 M. Assuming the volume is additive, calculate the molarity of the first solution?
determine the final volume of the gas If the gas ocupied 68mL, initally and determine the molarity of the solution
Solid ammonium nitrate (NH4NO3) and solid calcium chloride were placed in water and the mixture was stirred. What is the precipitate?
Two unknowns X and Y both having molecular formulas C4H8O, give the following results with four chemical tests. Propose structures for X and Y consistent with this infomation, Bromine Na Metal Chromic Acid Lucas Reagent
What is the pKa value of the proton alpha to the phenyl group, and what is the pka value of the proton attached to the carbonyl carbon?
Calculated percentage of alcohol in the patient's body the, State the chemical reaction that took place in the patient's body.
A mixture of 70 mole% butane and 30 mole % hyrdrogen is burned with excess air. Fractional conversion of 85% of the butane and 90% of the hydrogen are achieved
When extracting caffeine from tea why do you have to use cold NaOH and water vs. room temperature
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