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Identifying An Unknown Liquid And Precipitate
A high-boiling bp = 202 - 204 degrees C, burns with a yellow, sooty flame. Sodium fusion indicates that halogens, nitrogen and sulfur are not present. It is not soluble in water, dilute sodium bicarbonate solution, or dilute hydrochloric acid. However, it proved to be soluble in 5% aqueous sodium hydroxide solution. The compound gives a purple color with ferric chloride solution and precipitate when reacted with bromine-water. Treatment with hydroxylamine reagent did not give a reaction, but a white precipitate was obtained when the compound was treated with alpha-napthyl isocyanate. On drying, this white, solid derivative had a melting point of 127 - 129 degrees C.
Identify the original liquid and write a structure for the solid derivative. After identifying the unknown liquid can you indicate what the structure of the precipitate obtained on reaction with bromine might be?
If 145.0 mL of 0.350 M lithium hydroxide is required to titrate 35.0 mL of an unknown monoprotic acid, what is the molar concentration of the unknown acid.
The vapor pressure for methanol and ethanol at 50 C is 406 and 222 Torr, respectively. Calculate the total vapor pressure of a mixture at 50 C that contains 0.2 mol of methanol and 0.1 mol of ethanol.
an airplane is pressurized to 650 mmhg. The partial pressure of oxygen is 137 mmhg. If the partial pressure of oxygen drops below 100.mmhg.
Find the volume and the intermolecular force present in ammonia at STP in the following reaction and What is the intermolecular force is present in NH3(g).
A sample of argon gas occupies a volume of 950 mL at 25.0°C. What volume will the gas occupy at 50.0°C if the pressure remains constant?
Two compounds of nitrogen tetroxide(N2O4) and hydrazine(N2H4) are used as rocket fuels.When the two are mixed,they ignite and produce nitrogen gas and water.
A direct current was passed through a solution containing alanine, Match the behavior with correct amino acid. The isoelectric point of histidine is 10.0.
A solution is made by mixing 500 mL of .121 M NaOH with 500 mL of .1 M CH3COOH. Calculate the equalibrium concentrations of H+. CH3COOH, CH3COO-, OH- and Na+
What is the pH of the solution when the hydronium ion + concentration of 0.15 M CH3COOH is 6.3 × 10.
what is the appropiate mechanism for the radical polymerization of 1-butyne? show the polymerization of three units of 1-butyne.
The decay constant for strontium- 90 is 0.0247 y^-1. how many grams of strontium-90 remain if 10.0g decay for exactly 60 years.
If 4.10 mol calcium carbide (CaC2) reacts with an excess of water, how many moles of acetylene (C2H2) will be produced?
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