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Determine the concentration of CO32? ions in a 0.18 M H2CO3 solution. Carbonic acid is a diprotic acid whose Ka1 = 4.3 x 10?7 and Ka2 = 5.6 x 10?11
Draw an energy diagram for an exothermic reaction and then draw an enrgy diagram for an exothermi reaction with a catalyst.
From the values of delta H and delta S, predict which of the following reactions would be spontaneous at 25*C:
The I2 that did not react with ascorbic acid is then determined in a thiosulfate reaction. If 40.0mL of 0.4445M I2 was added to a sample containing vitamin C, the unused I2 required 19.05mL of 0.142M S2O32- to react. How many moles of vitamin C we..
Use balanced equations to determine whether either CuBr or Ca3(PO4)2 has a different solubility with a change in pH:
When the flask is allowed to cool the vapor condenses and aire again refulls the flask. Re weighing the flask and figure out the the wight of the unknown vapor which filled the flask during the boiling. Explain why it is not necessary to know the w..
Suppose that one needs 17.65mL of 0.1146M NaOH to titrate 25.00 mL of 0.0237M hydrofluoric acid. Assume no volume change when the salt is dissolved. Calculate the pH of the buffer.
Ionization energy is the energy required to remove an electron from an atom in the gas phase. The ionization energy of tin is 708.0 kJ/mol. Calculate the maximum wavelength of light that will ionize tin.
Reduction of Conjugated Ketones with Sodium Borohydride, Suggest mechanisms of reaction for 1,2-addition and for conjugate addition (1,4-addition) of NaBH4 to a conjugated
Draw the following peptides, AND indicating the amide bonds that are formed through the side chains. What are the pKa values of the various groups on the peptide?
Describe the predicted effect on glycine biosynthesis in a mutant mammalian cell if there is a mutation in the 5'-IRE sequence of ferritin mRNA that reduces the Ka of IRP binding as compared t binding with wild-type mRNA
What is the decay constant for iodine-131? It decays by beta emission with a half-life of 8.04 days.
predict whether solutions of the following salts are acidic, basic, or neutral.
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