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Laabri

Week 35, Chemistry 4, Task 2, Sec. 13.6 Bases

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Last updated about 6 years ago
6 Nsɛmmisa

Chapter 13: Acids and Bases

Sec. 13.6: Bases

Pages: 548 - 554

By the end of this task, you will be able to:

  • Write the expression of the base dissociation constant Kb.

  • Calculate the pH of a strong base solution.

  • Calculate the pH of a mixture of strong bases.

  • Calculate the pH of a weak base solution.

  • Calculate the percent dissociation of a base.

Watch the attached video recording titled “pH of Strong Bases” to understand how to calculate the pH of a strong base solution. Then answer the questions that follow.

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1.

Note: Pay attention to Stoichiometry.

Watch the attached video recording titled “pH of a Mixture of Strong Bases” to understand how to calculate the pH of a solution formed from mixing two or more strong bases. Then answer the questions that follow.

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2.

Calculate the pH of the solution formed from 0.0010 M, 10 ml of Ca(OH)2 and 0.020 M, 5 ml of RbOH.

Watch the attached video recording titled “pH of a Weak Base Solution and Percent Dissociation” to understand how to calculate the pH of a solution formed from a weak base and how to estimate the percent dissociation of the base. Then answer the questions that follow.

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3.

Answer question 3 here.

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4.

Calculate the percent dissociation of hydrazine.

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5.

Assess your level of confidence regarding your understanding of this task.

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6.

If you have any question about this task, please type it below to discuss it during the live session.