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The polyprotic weak acid phosphoric acid, H3PO4, has 3 ioniz…

The polyprotic weak acid phosphoric acid, H3PO4, has 3 ionizable protons with Ka1 = 7.5 x 10-3 M, Ka2 = 6.2 x 10-8 M, and Ka3 = 4.8 x 10-13 M. Which Ka would be the most difficult to determine using the acid-base titration technique discussed in class?

Published September 25, 2024
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Predict whether the equivalence point for a titration of NH3…

Predict whether the equivalence point for a titration of NH3 with HCl will be above, below, or at pH 7.0.

Published September 25, 2024
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Which is the half-reaction that occurs at a hydrogen electro…

Which is the half-reaction that occurs at a hydrogen electrode in acidic aqueous solution when it serves as the anode of a voltaic cell and what charge is the anode.

Published September 25, 2024
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If the equilibrium constant for a two-electron redox reactio…

If the equilibrium constant for a two-electron redox reaction at 298 K is 1.5 x 10-4, calculate the corresponding E°. Given R = 8.314 J/K-mol and F = 96,488 J/V-mol.

Published September 25, 2024
Categorized as Uncategorized

Which of the following is NOT a component of a voltaic cell?

Which of the following is NOT a component of a voltaic cell?

Published September 25, 2024
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Which of the following graphs would give a straight line for…

Which of the following graphs would give a straight line for a zero-order reaction?

Published September 25, 2024
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For the following reaction, Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu…

For the following reaction, Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s), calculate the emf at 25 °C with a [Zn(NO3)2] = 0.025 M and [Cu(NO3)2] = 0.50 M given the E° = 1.1 V, R = 8.314 J/K-mol, and F = 96,485 J/V-mol.

Published September 25, 2024
Categorized as Uncategorized

Which would be correct expression of the solubility product…

Which would be correct expression of the solubility product constant, Ksp, for Fe(OH)3?

Published September 25, 2024
Categorized as Uncategorized

A buffer is made by adding 0.300 mol CH3COOH and 0.300 mol C…

A buffer is made by adding 0.300 mol CH3COOH and 0.300 mol CH3COONa to enough water to make 1.000 L of solution. The pH of the buffer is 4.74. Calculate the pH of this solution after 15.0 mL of 4.0 M NaOH(aq) solution is added.

Published September 25, 2024
Categorized as Uncategorized

If the pH of a solution is 6.27, which of the following stat…

If the pH of a solution is 6.27, which of the following statements is true?

Published September 25, 2024
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