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1. a. How many grams of CuSO4•5H2O are needed to prepare 100.0 mL of a 0.15 M CuSO4 solution?
b. In order to make a solution that is 0.030 M in CuSO4, what volume of the above solution should be diluted to 5.00 mL with water?
2. A 0.10 M solution of compound "B" is measured in a 1.00 cm path length cuvette at a wavelength of 500 nm. The percentage of light transmitted through the cell is 38%.
a. What is the absorbance of this sample (A) at 500 nm?
b. Assuming Beer's Law holds, what is the value of e for compound B at 500 nm?
c. A sample of compound B having an unknown concentration is measured to have an absorbance of 0.90 in a 1.00 cm path length cell at 500 nm. What is the concentration of B in this sample, assuming Beer's Law holds?
An unknown gas sample with a mass of 3.17 g and a volume of 0.7521 L at 293.0 K under 1.023 atm has CH2Cl for its empirical formula. What are its molar mass and its molecular formula?
what are the influence of current economic crisis on student achievement in
On a sheet of paper draw the molecule that fits the given description. From the structure you drew determine the correct IUPAC name.
Describe a common buffer system and elution method in ion exchange chromatography. What are the salt ions in the elution buffer good for
Calculate the order of the reaction with respect to reactant C, the reaction rate constant, the overall order of reaction, and write the rate law for the reaction.
From the reaction of 0.1000 g of solid granular tin with 0.1000 g of solid iodine in 3.0 mL of solvent methylcyclohexane (density = 0.770 g/mL) was isolated 0.0740 g of an iodide of tin as the sole product of the reaction.
solid sodium metal reacts with water, giving a solution of sodium hydroxide and releasing hydrogen gas
Following is an example of a triprotic acid with pK values closer than 3 units, and pK3 less than 10. You have a 20.0 mL solution of the triprotic acid, H3A, with a concentration of 0.128 M, and are titrating it with a 0.250 M solution of NaOH.
the pka of benzoic acid and 4-nitroanilinium hydrochloride are 4.2 and 1.0 respectively.a. determine the keq for the
If 19.2 g of CO2 is produced in the reaction of C2H2 with O2 to form CO2 and H2O, how many grams of H2O are produced in this reaction.
if 5.25mL of 0.1000 M NaOH solution is needed to just neutralize excess acid after 20.00 mL of 0.1000 M HCl was added to 1.00 g of an antacid, how many moles of acid can the antacid counteract per gram.
how do i prepare 50 mL of the 0.00625 M HCl solution by an appropriate dilution of the 0.0125 M HCl solution
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