... .97g. The percent yield was calculated to be 74.1%% recovery. Introduction Alkyl halides are a particular class of organic compounds whose structural components include a halogen attached to an alkyl group (general formula R-X). Though there exists quite a number of methods with regard to the synthesis of these alkyl halides, the most common of the variety is through the replacement of the hydroxyl group ... ...

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... into a cup filled with the second solution for that pair. 5. Weigh the cell after 30 minutes and record the initial weight. 6. Calculate the percent change in weight using the following formula: (initial / initial)/initial X 100. Record your results. Results: At the end of the experiment, it is evident that the solutions either loss water or gained water. When we took the ... ...

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• Grade Level: High School

... be determined by setting up a ratio between the drops (volumes) of EDTA and the ions and equating it to the ratio of the concentrations of the two. This is the formula you should use in order to find the unknown titration: CEDTA VEDTA = CIONS VIONS -Example of calculation 1 -(2.00 x 10-4 M) x 14 drops = CIONS x 1 drop CIONS = .0028 M Since the concentration of the ... ...

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• Grade Level: High School

... change for the equation above. MgSO4 + H2O =  Mg2+ + SO42- + H2O MgSO4•7H2O + H2O =  Mg2+ + SO42- + 7H2O + H2O To determine the change in enthalpy of each equation, we use the formula: ∆H=m.s.∆T, where ∆H is the change in enthalpy (measured in Joules per unit mass - eg. joules per 15.5 grams), m is the mass of either the anhydrous or hydrated magnesium ... ...

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• Grade Level: High School