Question 7: Did the Rolaids solution function as a good buffer? Justify your res

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Question 7:  Did the Rolaids solution function as a good buffer? Justify your results.

Question 8:  Compare the yellowing of the phenol red in the Rolaids solution with the yellowing of the phenol red in the alkaline water when challenged with increasing drops of vinegar (Table 2-6, p. 42). Discuss the significance of these results.

pH Drops of Vinegar 10.05 9.81 8.66 7.8 7.5 7.38 6.9 6.36 6.07 5.78 5.4 4.86 4.64 10.23 4.54 4.06 3.77 0 Titration Curve 10 20 30 40 50 75 100 125 150 200 250 0 300 250 200 Solution 150 Wate a 100 10 20 30 40 50 75 100 125 150 200 250 3.6 3.51 3.43 3.28 3.2 3.14 3.09 3.04 pH .7 2.97 9 30 31

Explanation / Answer

7) The Rolaids solution did not function as a good buffer. This can be determined by its inability to maintain the pH of the solution. It cannot neutralise the excess acid in the stomach.

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