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In a synthesis experiment you obtain a sample of product on which you do a melting point determination and find a melting point range of 108.0 to 114.3 degrees Celsius. The sample is supposed to be benzoic acid. What preliminary conclusion(s) can you reach from this one determination
1) The sample is probably impure.
2) The sample is not benzoic acid
3) The melting point determination may need improvement -- it may not have been done properly, and make 4) sure it was repeated at least once.
5) The sample probably needs recrystallization.
6) The sample may be benzoic acid.
During a lab experiment, we were to determine the relative level of saturation by adding, drop by drop, a solution of bromine in cyclohexane to oil and a fat, individually. However, the color that is supposed to be retained due to unreacted bromin..
25.2 mL of qater are placed in a graduated cylinder. A 22.6 g stone is dropped in, and the water level rises to 32.4 mL. Find the stone's density.
degrees Celsius to a final volume of 34.6 L. During the expansion the gas cools to 12.0 degrees celsius. what is the final pressure?
solution of potassium sulfate. Assuming that all ionic species are completely dissociated, what is the osmotic pressure of the mixture in torr?
Determine whether a solid forms when solutions containing the following salts are mixed. If so, write the ionic equation and the net ionic equation. NaF and AgNO3 . Write the ionic equation.
What is the pH of a solution prepared by mixing 25.00 mL of 0.10 M methylamine, CH3NH2, with 25.00 mL of 0.10 M methylammonium chloride, CH3NH3Cl.
An oxide of manganese consists of 77.4% manganese by mass. Determine its empirical formula and enter it in the box below.
A process stream contains mostly light species 1 and heavy species 2 . A relatively pure liquid stream containing mostly 2 is desired, obtained by a single-stage liquid/vapor separation
the total pressure of the system is found to be 4.50 atm At 700 degrees celsius. compute the equilibrium partial pressures of carbon dioxide and carbon monoxide if the equilbrium constant Kp = 1.52,
What is the solubility in pure water of Ba(IO3)2 in moles per liter at 15 ?C? [Ksp (15 ?C) = 2.0 x 10-10]
Kc for this reaction is 5.1 at 400 degrees C. Calculate the equilibrium concentrations of the four gases if the initial concentration of each of them is 0.050M.
A metal, M, was converted to the chloride, MCl2. Then a solution of the chloride was treated with silver nitrate to give silver chloride crystals, which were filtered from the solution.
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