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Explain when performing the recrystallization step, you boiled down the solvent until you began seeing crystals form and then let it cool on the bench as well as then further cooling it with ice. Define why this was necessary for the recrystallization be thorough
Find the equilibrium concentrations of \rm A and {\rm B} for a = 1 and b = 2. Assume that the initial concentration of \rm A is 1.0 {\rm M} and that no {\rm B} is present at the beginning of the reaction. kc=2.3
In the presence of large excesses of I^-1 ion, the following set of data is obtained. What is the average rate of disappearance of H2O2(aq) in M/s in the first 45.0 seconds of the reaction if 1.00L of H2O2 reacts at 25C and 1.00atm pressure?
What is the concentration of glucose in the original sample? In moles/liter? And in mg%?
A beaker with 200 mL of an acetic acid buffer with a pH of 5.00 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 . A student adds 7.20 mL of a 0.490 M solution to the beaker. How much will the pH chan..
The subsequent reactions adding in any necessary other reactants to perform the following transformations and indicate mechanism likely to take place during the reaction.
A packet of the same soup sold in the U.S. would have the same nutritional information in kilocalories per cup. There are two cups in a pint. How many nutritional calories would be quoted per cup of prepared soup?
air at 100 kpa and 27degc enters an isentropic compressor at a rate of 100 ls and leaves at 1000 kpa. determine the
Which of the following compounds is expected to have the highest boiling point
If you had a mixture of benzoic acid (C6H5CO2H) and biphenyl (C6H5C6H5), how would you purify them based on solubility/recrystallization
starch and buffer and the total volume was made up to 500 ml with distilled water. The solution turned blue 9 indicating the presence of I2) in 1.8 minutes. Calculate the initial rate of disappearance of H2O2 in units of M min^-1 to two significan..
Complete the titration of a weak diprotic solid acid. You take 178.0 mg of the solid acid as well as dissolve it in about 50mL of distilled water. You titrate with 0.095 M NaOH as well as arrive at an endpoint at 25.20mL.
a gaseous reaction occurs at a constant pressure of 35.0 atm and releases 65.0 kj of heat. before the reaction the
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