Exam 8: Applications of Aqueous Equilibria

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Calculate the pH when 200.0 mL of a 1.00 M solution of H2A (Ka1 = 1.0 10-6, Ka2 = 1.0 10-10) is titrated with the following volumes of 1.00 M NaOH. -400.0 mL of 1.00 M NaOH

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A 50.0-mL sample of 2.0 10-4 M CuNO3 is added to 50.0 mL of 4.0 M NaCN. Cu+ reacts with CN- to form the complex ion Cu(CN)32-: A 50.0-mL sample of 2.0 <font face=symbol></font> 10<sup>-</sup><sup>4</sup> M CuNO<sub>3</sub> is added to 50.0 mL of 4.0 M NaCN. Cu<sup>+</sup> reacts with CN<sup>-</sup> to form the complex ion Cu(CN)<sub>3</sub><sup>2</sup><sup>-</sup>:   The concentration of Cu<sup>+</sup> at equilibrium is The concentration of Cu+ at equilibrium is

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A 10-mL sample of tartaric acid is titrated to a phenolphthalein endpoint with 20. mL of 1.0 M NaOH. Assuming tartaric acid is diprotic, what is the molarity of the acid?

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A titration of 100.0 mL of 1.00 M malonic acid (H2A) was done with 1.00 M NaOH. For malonic acid, Ka1 = 1.49 10-2, Ka2 = 2.03 10-6. -Calculate [H+] after 150.0 mL of 1.00 M NaOH has been added.

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Calculate the pH when 200.0 mL of a 1.00 M solution of H2A (Ka1 = 1.0 10-6, Ka2 = 1.0 10-10) is titrated with the following volumes of 1.00 M NaOH. -300.0 mL of 1.00 M NaOH

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If 22 mL of 0.50 M HCl is added to 112 mL of 0.20 M NaOH, what is the final pH?

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Which of the following compounds has the lowest solubility, in moles per liter, in water at 25°C?

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A solution of hydrochloric acid of unknown concentration was titrated with 0.11 M NaOH. If a 150-mL sample of the HCl solution required exactly 12 mL of the NaOH solution to reach the equivalence point, what was the pH of the HCl solution?

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It is observed that 7.5 mmol of BaF2 will dissolve in 1.0 L of water. Use these data to calculate the value of Ksp for barium fluoride.

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The concentration of Al3+ in a saturated solution of Al(OH)3 at 25°C is 5.2 10-9 M. Calculate the Ksp for Al(OH)3.

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Consider the following information about the diprotic acid ascorbic acid (H2As for short, molar mass = 176.1). Consider the following information about the diprotic acid ascorbic acid (H<sub>2</sub>As for short, molar mass = 176.1).   The titration curve for disodium ascorbate, Na<sub>2</sub>As, with standard HCl is shown below:   -What major species is(are) present at point III? The titration curve for disodium ascorbate, Na2As, with standard HCl is shown below: Consider the following information about the diprotic acid ascorbic acid (H<sub>2</sub>As for short, molar mass = 176.1).   The titration curve for disodium ascorbate, Na<sub>2</sub>As, with standard HCl is shown below:   -What major species is(are) present at point III? -What major species is(are) present at point III?

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