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A 1.000-mL sample of unknown containing Co 2+ and Ni 2+ was treated with 25.00mL of 0.03872M EDTA. Back titration with 0.02127 M Zn 2+ at pH 5 required 23.54 mL to reach the xylenol orange end point. A 2.000-mL sample of unknown was passed through an ion exchange column that retards Co 2+ more than Ni 2+. The Ni 2+ that passed through the column was treated with 25.00 mL of 0.03872M EDTA and required 25.63 mL of 0.02127 M Zn 2+ for back titration. The Co 2+ emerged from the column later. It, too, was treated with 25.00 mL of 0.03872 M EDTA. How many milliliters of 0.02127 M Zn2+ will be required for back titration?
During an experiment, you will be required to prepare 100 mL of a 1.0 M solution of NaNO3. Calculate the mass of NaNO3 (to the nearest tenth of a gram) that will be required.
Give a step by step mechanism for the reaction of the following: a. salicylic acid with acetic anhydride/ phosphoric acid b. salicylic acid with methanol/hydrochloric acid
The solubility of nitrogen gas in water at 0 degree celcius and 1.0 atm is 23.54 mL per liter of the solution. (a) Calculate the Henry Law constant at 0 degree celcius
A student determines the molar mass of methanol. She found that the equilibrium temperature of a mixture of ice and pure water was 0.4 degrees C on her thermometer
The normal boiling point of methanol (CH3OH) is 64.7oC, and its molar enthalpy of vaporization is Hvap = 71.8 kJ/mol.
Which of the following is a neutralization reaction?
When isobutylene (CH3 - C=CH2) is treated with acid, two products result: 2, 4, 4-trimethyl-2-pentene and 2,4,4-trimethyl-1-pentene
a 1.33 m solution of citric acid h3c6h5o7 in water has a density of 1.10 gcm3. calculate the mole fraction of the
A 2.000-L flask was filled with 0.0393 mol SO2 and 0.0197 mol O2. At equilibrium at 907 K, the flask contained 0.0299 mol SO3. How many moles of each substance were in the flask at equilibrium
Imagine you want to determine the binding constant for a reaction. You know you will need to generate data to calculate the binding constant.
When doing the kinetic trial, Peyton mistakenly omitted the starch solution from the kinetic trials. How will this omission change the appearance of the resultant solution (from mixing solutions A&B) from that of a correctly completed expiernment?..
The density of a liquid sulfur compound is 1.14 gmL1. This compound contains 23.7% sulfur. How many milliliters of the compound must be burned to obtain 6.40 g of SO2? Molar Mass SO2 64.1 gmol
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