What are the clear differences in reduction of [Co(NH3)5MoO4] + and [Co(NH3)5CrO4] + by L-ascorbic acid?...

What are the clear differences in reduction of [Co(NH3)5MoO4] + and [Co(NH3)5CrO4] + by L-ascorbic acid? Would you expect L-ascorbic acid to reduce the Co(III), Cr(VI), and Mo(VI) metal centers when you discuss this interesting chemistry?

Expert Solution

queen_honey_blossom answered 1 year ago

Consider a the titration of 0.685 L of 0.773 M ascorbic acid (H2C6H6O6) with 1.76 M...

Consider a the titration of 0.685 L of 0.773 M ascorbic acid (H2C6H6O6) with 1.76 M NaOH. What is the pH at the second equivalence point of the titration?

Ascorbic acid or Vitamin C, H2C6H6O6, is a weak diprotic acid. What are the concentrations of...

Ascorbic acid or Vitamin C, H2C6H6O6, is a weak diprotic acid. What are the concentrations of H+, H2C6H6O6, HC6H6O6- and C6H6O62- in a 0.10 M aqueous solution of ascorbic acid? For ascorbic acid Ka1=7.9x10-5 and Ka2= 1.6x10-12.

12. Consider the titration of 0.100 L of 0.200 M ascorbic acid with 0.500 M NaOH....

12. Consider the titration of 0.100 L of 0.200 M ascorbic acid with 0.500 M NaOH. What is the pH at the endpoint of the titration? Enter your answer to two decimal places; for this question we can assume the 5% assumption is valid.

The rate of reduction of [Co(NH3)5(OH2)]3 by Cr(II) is seven orders of magnitude slower than reduction...

The rate of reduction of [Co(NH3)5(OH2)]3 by Cr(II) is seven orders of magnitude slower than reduction of its conjugate base, [Co(NH3)5(OH)]2, by Cr(II). For the corresponding reductions with [Ru(NH3)6]2, the two differ by less than a factor of 10. What do these observations suggest about their mechanisms?

The rate of reduction of [Co(OH2)(NH3)5] 3+ by Cr2+ is 7 orders of magnitude slower than the...

The rate of reduction of [Co(OH2)(NH3)5] 3+ by Cr2+ is 7 orders of magnitude slower than the reduction of [Co(OH)(NH3)5] 2+ by Cr2+. For the corresponding reduction with [Ru(NH3)6] 3+, the two differ by less than a factor of 10. What do these observations suggest about the mechanism?

Ascorbic acid (vitamin C, C6H8O6) is a water-soluble vitamin. A solution containing 81.0 g of ascorbic...

Ascorbic acid (vitamin C, C6H8O6) is a water-soluble vitamin. A solution containing 81.0 g of ascorbic acid dissolved in 220 g of water has a density of 1.22 g/mL at 55 ∘C. Calculate the mass percentage. Calculate the mole fraction. Calculate the molality. Calculate the molarity of ascorbic acid in this solution.

how does the Ascorbic Acid Method (SPR) work?

A 0.1219 g sample of a Vitamin C (ascorbic acid) tablet was dissolved in acid. A...

A 0.1219 g sample of a Vitamin C (ascorbic acid) tablet was dissolved in acid. A 25.00 mL aliquot of 0.01739 M KIO3 was added along with excess KI. The resulting solution was titrated with 0.07211 M thiosulfate, requiring 21.44 mL to reach the endpoint. Compute the weight percent of ascorbic acid (FW = 176.12) in the tablet.

A 0.250 m ascorbic acid solution is 1.79% ionized at 25 degrees. what is the pka...

A 0.250 m ascorbic acid solution is 1.79% ionized at 25 degrees. what is the pka for the ascorbic acid at this temp??

You are titrating 25 mL of 0.25 M Ascorbic Acid solution ith 0.15 M NaOH. Ascorbic...

You are titrating 25 mL of 0.25 M Ascorbic Acid solution ith 0.15 M NaOH. Ascorbic Acid is an organic diprotic acid, H2A, that is found in many natural materials. Ka1 = 7.94 x 10^-5 and Ka2 = 1.62 x 10^-12. What is the a) initial pH, b) at the 1st equivalence point, c) the 2nd equivalence point, and d) after 27.5 mL of NaOH have been added?

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