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*An impure sample of sodium sulfate containing sodium chloride was analyzed by this method. The calculated percent sulfate based on the precipitated BaSO4 was 53.7%. What percentage of the original unknown sample is NaCl instead of Na2SO4? Show your work below and continue on the back of this page if need be.
calculate the pKa value of the acid and determine the number of moles of acid initially present.b) when the reaction is complete, what is the concentration ratio of conjugate base to acid?
The first equivalence point was at 7.59mL and the second equivalence point was at 14.91 mL. My calculated pKa1 is 2.01 and pKa2 is 5.71. What is the molarity of the maleic acid
If the tosylate of (2S,3S)-3-phenylbutan-2-ol undergoes an E2 removal on treatment with sodium ethoxide. Depict the structure of the alkene that is produced.
At what pH will an aqueous solution of 0.210 M Mn2+ begin to precipitate as Mn(OH)2 at 25 °C? The Ksp for Mn(OH)2 is 1.9 x 10-13
calculate the number of moles of potassium which combine with bromine to form KBr.
How much heat is required to raise the temperature of 48.5g of water from its melting point to its boiling point. Express your answer numerically in kilojoules. Can someone answer this for me in decimal form
The energy levels of hydrogenlike one-electron ions of atomic number Z differ from those of hydrogen by a factor of Z^2. Predict the wavelength of the transition
what is the minimum amount of ice at 0C that must be added to the contents of a can of diet cola (340mL) to cool it from 20.5C to 0C?
Strontium-90 is one of the products of the fission of uranium-235. This strontium isotope is radioactive, with a half-life of 28.1 yr. Calculate how long it will take for 0.600 g of the isotope to be reduced to 0.310 g by decay.
what are two structural features that allow soap molecule to work in either to have a good soap
Suppose you have two solutions to titrate with NaOH: (a) 10mL of 0.1 M HCl and (b) 10 mL of 0.1 M CH3COOH.
A 202 mL benzene solution containing 2.27g of an organic polymer has an osmotic pressure of 8.63 mmHg at 21 degrees Celsius. Calculate the molar mass of the polymer
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