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The rate constants for a first order reaction are found to be 2.76 x 10-5 s-1 at 25 degrees and 6.65 x 10-4 s-1 at 50 degrees C, respectively
A) calculate the rate constant at 75 degrees C
Potassium hydroxide is used to precipitate each of the cations from their respective solution. Determine the minimum concentration of {\rm KOH} required for precipitation to begin in each case.
Pure iron, Fe, can be produced from an ore called hermatite, Fe2O3, by reaction with carbon at high temperatures. 2Fe2O3+3C ---> 4Fe+3CO2. If an iron company needs to make 25 tons of iron, how many tons of hematite much react
State whether the following reactions are spontaneous or non spontaneous at low temperature, high temperature or all temperatures
Heat the solution to a gentle boil and maintain the heat for 1 minute to remove dissolved carbon dioxide. Add 4-8 drops of bromophenol blue indicator, which is yellow in acidic solution and blue in basic solution. If the solution is blue, pipet an..
While mercury is very useful in barometers, mercury vapor is toxic. Given that mercury has a DHvap of 56.9 kJ/mol and its normal boiling point is 356.7°C, calculate the vapor pressure in mm Hg at 25°C. the answer is 4.29 x 10-3 mm Hg
Conductivities are often measured by comparing the resistance of a cell filled with the sample to its resistance when filled with some standard solution, such as aqueous potassium chloride. The conductivity of water is 76 mS m^?1 at 25°C
Determine What is the percent by mass of sodium phosphate in a 0.142M Na 3 PO 4 (aq) solution? If it is given that it has a density =1.015g/mol.
Find the pH during the titration of 20.00mL of 0.1000M triethylmine, Kb=5.2x10^-4, with 0.1000M HCl solution after the addition of 10.00mL of titrant
Derive the activation energy for a reaction that proceeds 2 times faster when the temperature is raised from 20 C to 30 C. (show all work)
Determine the balanced net ionic equation when aqueous solutions of AgNO3 and NaI are mixed. The balanced net ionic equation is:
when 157mg of dipentylamine was added to 122mg of benzoic acid and 2ml of water a completely homogenous solution was
what will heating tert-butyl chloride with 1.oM NaOH in a mixture of water and methanol yeild?
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