Phun With Phosphate - Phun With Phosphate Anthony Upshaw Partner Brock Harris Chemistry 112L-007 April 8 2016 A Research Questions 1 what happens when

Phun With Phosphate - Phun With Phosphate Anthony Upshaw...

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Phun With Phosphate Anthony Upshaw Partner: Brock Harris Chemistry 112L-007 April 8, 2016
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A. Research Questions 1) what happens when NaOH or HCl is added to your Buffer? 2)What happens when a buffer is not present? B. Observations and Results Table 1. Volume (L) 0.10 L Concentration (M) 0.100 M pH 6.6 Table 2. Component Molar mass (g/mol) Mass (g) Moles Acidic or Basic Na 2 HPO 4 7H 2 O 268.07 0.536 0.002 Basic NaH 2 PO 4 H 2 O 137.99 1.101 0.008 Acidic Table 3. pH (measured) pH (calculated Prediction) DI water 5.6 iiiiiiiiiiiiiiiiiiiiiiiiiii Phosphate Buffer 6.2 6.6 Buffer+ NaOH 6.25 7.79 Buffer + HCl 6.16 6.16 NaOH in H 2 O 11.39 11.30
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HCl in H 2 O 2.66 2.69 Calculations refer to page 1 in notes. C. Claims The buffer allows for the solution to absorb more OH and or H ions and stay close to the original pH. When the buffer is not present, the pH goes drastically towards the ions which were mixed into the solution. D. Evidence As shown in the data, when the buffer was present, the solution was able to stay with in a small difference of the original pH. This was
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  • Spring '14
  • pH, buffer solution

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