P H Balance - Antacids as Buffers PDF

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Summary

P H Balance - Antacids as Buffers
Different antacids will have a different effective buffering capacity....

Description

Laboratory Simulation

9/2/21, 9:55 PM

Student: Phuong

My Hypothesis: Different antacids will have a different effective buffering capacity.

My Strategy: I will add a different antacid to individual beakers and measure the number of drops of acid needed to turn the phenol red indicator yellow.

Lab summary: In this experiment, which antacid was the most effective buffer? Alumina/magnesium trisilicate

The dose of antacids greatly influences their buffering capacity with acid. In this experiment, you measured the buffering capacity of one recommended dose of antacids. How would your results change if you used the same weight for all antacids instead? A different antacid would be found to be the most effective.

Why does the best antacid require the most drops of acid to change the color of the solution? The best antacid can neutralize the most acid, so it resists changes in the pH the longest.

Why did the different antacids have different effectiveness buffering the HCl?

Select all that apply. A single dose was used and they use different quantities of the active ingredient. They use different buffering chemicals.

Collected Lab Data Beaker

Antacid

1

Distilled water

HCl Drops to Acidify 1

2

Calcium carbonate and magnesium hydroxide

13

3

Alumina/magnesium trisilicate

21

4

Famotidine

15

5

Sodium bicarbonate citric acid

10

6

Chewable calcium carbonate

14

Saved Graphs

HCl Drops to Acidify

Graph 1

Antacid

https://vlsimulation.learningtools.prod.mheducation.com/virtual-labs/simulations/1.12.2/ph-balance/antacids/sim-lab/lab-phases.html

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