Question

what is your prediction for this experiment?
a all antacids will have the same effective buffering capacity
b antacids will have no buffering capacity
c different antacids will have a different effective buffering capacity
select your strategy for determining the effectiveness of different antacids.
a i will dissolve a different antacid in all the beakers and measure the number of drops of phenol red needed to turn the liquid red
b i will add a different antacid to individual beakers and measure the number of drops of phenol red needed to change the ph
c 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
d i will add acid to a beaker and measure the amount of antacid needed to turn the phenol red indicator red

Explanation:

Antacids vary in composition, so different ones will have different buffering capacities. To test antacid effectiveness, adding acid and seeing how much is needed to change the indicator color (which reflects pH - change) is a valid approach. Phenol red changes color based on pH, turning yellow in acidic conditions.

Answer:

C. Different antacids will have a different effective buffering capacity
C. 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