Chm 206 Spring 2019 Expt 8 Buffers I Lab
Names *
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Section
Lab Station (No space between number and letter) *
(for example, 6A, 9B, etc.)
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Enter your complete CU Email address (CAUTION! Your report will be sent the address exactly as entered) *
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Enter your partner's Email address
Group of 3? Visitor submits a separate form and leaves this question blank.
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1. What pH buffer were you assigned? *
(Enter only the number -- no words. For example, 4.65)
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2. (2 pts) What is the weak acid in your buffer? *
3. (4 pts) How many moles of weak base did you calculate you needed from the Henderson-Hasselbalch Eqution?
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4. (2 pts) What mass of weak base did you actually use? (from the balance)
Significant figures! Record mass exactly as displayed by balance. Include units!
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5. (2 pts) What mass of the weak acid did you actually use? (from the balance)
Include units and significant figures
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6. (3 pts) After converting the actual masses of weak base and weak acid measured out on the balances to moles, what pH does this give using the Henderson-Hasselbalch equation?
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7. (2 pts) What pH resulted from this buffer?
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8. (1 pt) Did you need to add strong acid or base to adjust your pH to the assigned value?
9. What was your final pH after adjustment?
(As shown to the TAs)
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