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1. Consider the structure of caffeine (re-draw it here), and answer the following questions from a structural perspective.
a. Caffeine is an alkaloid and, as such, is weakly basic. Circle and label the basic atom or atoms (hints: consider the base in Experiment 4C, and consult the Derivative procedure on page 235).
b. Identify (circle on your structure) and discuss specific structural features that would account for solubility in water (hint: think intermolecular forces).
c. Identify (circle on your structure) and discuss structural features that would account for solubility in methylene chloride (hint: think intermolecular forces).
Problem- Calculate the concentration of iodate ions in a saturated solution of barium iodate, Ba(IO3)2. The Ksp = 1.5 Ã? 10-9.
A titration of 100mL of 1M malonic acid (H2A) was done with 1M NaOH. For malonic acid, Ka1=.0149, Ka2=.00000203. Calculate the [H+] after 300mL of 1M NaOH has been added.
A solution of only A is made that is initially 0.800 M. After the solution is allowed to reach equilibrium, it is determined that the concentration of B is 1.20 x 10^-4 M. Use this information to determine the equilibrium constant for the reaction..
How many total moles are produced when 0.69 mol of ethanol (CH3CH2OH) are combusted in oxygen to produce carbon dioxide and water
Could you please tell me between water and alcohol, which one is more polar. and why. (please, as detailed as possible). What factors need to be considered to compare the polarity of 2 molecules.
What is the arrow pushing mechanism for the depolymerization of PET (polyethylene terephthalate) with KOH and pentanol? And what is the mechanism used to convert the resulting compound to terephthalic acid?
what is the percent relative error? Please explain by showing work. Are these measurements more precise or more accurate? What is the purpose of repetition in measurements?
a give a complete analysis of the following data collected for the of sulfate in a sample 17.26 17.48 18.85 16.88
For chemical reactions involving ideal gases, the equilibrium constant K can be expressed either in terms of the concentrations of the gases (in M) or as a function of the partial pressures of the gases
The Ksp of magnesium phosphate at a given temperature is 9.78 x 10-17. Calculate the molar solubility at this temperature.
A steel railroad bridge uses a zinc sacrificial anode to limit the extent of oxidation of the steel. If a 5.1 kg anode is completely ozidized to Zn2+ over the course of 15.5 years, compute the average current flowing through the anode.
A compound is produced when 6.08g of nitrogen combine completely with 13.92 g oxygen. What is this compound
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