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Describe the possible effect on your results of the following experimental errors. In each case, specify the component(s) whose percentage(s) would be too high or too low.
a) After adding dichloromethane to panacetin, you didn't stir or shake the mixture long enough.
b) During the NaOH extraction, you failed to mix the aqueous and organic layers throughly.
c) You mistakenly extracted the dichloromethane solution with 5% HCl rather than 5% NaOH.
d) Instead of using pH paper, you neutralized the NaOH solution to pH 7 using litmus paper.
When 3 methyl 1 butane reacts with Hbr, two alkyl halides are formed: 2 bromo 3 methylbutane and 2 bromo 2 methyl butane. Propose a mechanism that explains the formation of these products.
Pepsin is the principal digestive enzyme of gastric juice. A 3.00g sample of pepsin is dissolved in enough water to make 10.0 mL of solution. The osmotic pressure of the solution is found to be 0.213 atm. What is the molecular weight of pepsin
a sample of nitrogen gas is collected over water at a temperature of 23.0 degrees celcius. what is the pressure of the
What by-product would be obtained in high yield if the diazotization of p-toluidine were carried out at 30°C instead of 0 to 5°C
Propose a step-by-step microscale extraction procedure that could be used to separate a mixture nitrobenzene, 4-methoxybenzoic acid, and benzylamine into the pure compounds using extraction technique.
What volume (in milliliters) of 0.190 M NaOH should be added to a 0.135 L solution of 0.022 M glycine hydrochloride
what is the osmolarity of a solution containing 0.1 m nano3 and 0.2 m nacl? what is the molarity of the solution
What volume (in mL) of 0.220 M NaOH should be added to a 0.135 L solution of 0.028 M glycine hydrocholoride
Calculate the vapor pressure of a solution prepared by dissolving 0.75 mol of safrole in 950 g of ethanol (46.07 g/mol)
A student attempted to identify an unknown compound by the method used in this experiment. she found that when she heated a sample weighing 0.4826 g, the mass barely changed
Calculate the average molar mass of this element. The mass of the neutron is 1.67262164 × 10324 g and the mass of the proton is 1.67492721 × 10324 g. Assume for each isotope, the mass defect (that is, the mass of the neutrons and protons that is c..
for an ideal diatomic gas which of the following properties will be in error if the symmetry number in the rotational
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