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Quiz 8 - Chemistry I, Fall 2008 - Prof. Anthony Mellone, Quizzes of Chemistry

Valencia CollegeChemistry
Prof. Anthony Mellone

The eighth quiz for the chemistry i course offered in the fall of 2008. The quiz covers topics such as ph calculations for various concentrations of acids and bases, including hydrocyanic acid (hcn), ammonia (nh3), and acetic acid (hac), as well as the basic nature of sodium acetate. Students are required to show their work and report answers to the correct number of significant figures.

Typology: Quizzes

2009/2010

Uploaded on 02/25/2010

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CHM 1046 Fall, 2008
Quiz 8
Name (print)_________________________
Show your work for complete (and partial) credit. Report your answers to the correct
number of significant figures, and use units where appropriate. Kw=10-14
1. What is the pH of 0.15M HCN? For HCN, Ka=4.9x10-10.
2. What is the pH of 0.10M NH3(aq)? Kb for NH3 = 1.8x10-5.
3. A solution of sodium acetate is basic. Write a chemical equation that shows why/how
sodium acetate produces a basic solution.
4. What is the pH of 0.10M NaAc? For HAc, Ka = 1.75x10-5.
5. One solution of HCl(aq) has a pH of 2.00. A second HCl(aq) solution has a pH of 3.00.
What is the pH of a solution made by mixing 1.00L of each solution?

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CHM 1046 Fall, 2008 Quiz 8 Name (print)_________________________ Show your work for complete (and partial) credit. Report your answers to the correct number of significant figures, and use units where appropriate. Kw=10-

  1. What is the pH of 0.15M HCN? For HCN, Ka=4.9x10-10.
  2. What is the pH of 0.10M NH 3 (aq)? Kb for NH 3 = 1.8x10-5.
  3. A solution of sodium acetate is basic. Write a chemical equation that shows why/how sodium acetate produces a basic solution.
  4. What is the pH of 0.10M NaAc? For HAc, Ka = 1.75x10-5.
  5. One solution of HCl(aq) has a pH of 2.00. A second HCl(aq) solution has a pH of 3.00. What is the pH of a solution made by mixing 1.00L of each solution?