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The absorbance of solutions containing Cr as dichromate Cr2O7-2 in 1.0M H2SO4 were measured in a 5cm cell. The following results were obtained
Concentration(M) Absorbance
0.0000015 0.0340.0000030 0.0850.0000060 0.1680.0000105 0.2520.0000120 0.3350.0000210 0.669
What is the molar absorptivity of dichromate?
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A solution contains 4.64g KCl in 178 mL of solution. The density of the KCl solution is 1.14 g/mL. What is the molarity,M, for the potassium chloride solution?
KCN is dissolved in water in a calorimeter that has a total heat capacity of 2.294 kJ·K-1, the temperature decreases by 0.470 K. Calculate the molar heat of solution of KCN.
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