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You are given an impure sample of a phenol and asked to purify it. You ask for information about the suspected impurities, but it seems no one really knows. So you ask for an IR/NMR spectra of the impure sample. Upon scrutinizing the IR spectrum carefully, you find that there is a small, but significant, signal at about 1700 cm-1, a small broad peak at about 3000 cm-1 and a much stronger broad peak centered at about 3580 cm-1. That gives you an idea about the nature of the impurity, so you scrutinize the 13C NMR spectrum, looking for a short signal at ~170 ppm- you find it. You then look for a signal in the 10-13 ppm range in the 1H NMR spectrum- there seems to be a little “blip†on the baseline at 11.5 ppm, but it is not very clear.What can you say about the nature of the impurities, based on the IR spectrum? How does the 13C NMR signal at 170 ppm support this conclusion? What were you looking for in the 10-13 ppm range in the 1H NMR spectrum? Explain your reasoning.
The equilibrium of Fischer esterification reactions in general is slightly towards product formation. The equilibrium can be made more favorable for product formation by all of the following except
Calculate the amount of energy in kilojoules needed to change 117g of water ice at -10degrees Celcius to steam at 125 degrees Celcius
Calculate what quantity of potassium chlorate that has molecular weight of 122.5 needed to form 33.6 litres of oxygen? Express your answer in grams and assume that temperature and pressue will be in normal condition?
Calculate the percent ionization of propionic acid (C2H5COOH) in solutions of each of the following concentrations: a) 0.250 M
If 145 grams of potassium nitrate were added to water to make 1,500 mL of solution, what would be the molarity of the resulting solution?
A solution of sodium nitrate, NaNO3, in water is 5.181 molar and its density is 1.2680 g mL-1. Calculate the percent, by weight, of sodium nitrate in the solution.
for the reaction represented by the equation cl2 + 2kbr 2kcl +br2 how many moles of potassium chloride are produced from 119 g of potassium bromide?
95% wt solution of ethanol in water has density of 0.804gm/mL. Find mass of 1.00L of this solution and the number of grams of ethanol per litre ?
An oil bath maintained at 50.5oC loses heat to its surroundings at the rate of 4.68 kJ/min. Its temperature is maintained by an electrically heated coil with a resistance of 60 operated from a 110 V line.
Calcium hydride, CaH2, reacts with water to form hydrogen gas. CaH2(s) + 2 H2O(l) → Ca(OH)2(aq) + 2 H2(g)
The name of this covalent compound is nitrogen trioxide. d. The name of this ionic compound is manganese oxide.
Determine how many moles of each Na+ and Cl- are in 1.00L of the saline solution?
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