Jack prepared two glasses half full of room temperature water. He added a whole Alka-Seltzer® antacid tablet to glass #1 and a crushed Alka-Seltzer® antacid tablet to glass #2. He stirred the mixtures in both glasses at the same time. After one minute, he observed that there was still some antacid at the bottom of glass #1 while all the antacid in glass #2 disappeared.What conclusion can Jack make based on this experiment?A. Antacid tablets dissolve faster in water at room temperature than in water at higher temperatures.B, Decreasing the surface area of antacid makes it more soluble in room temperature water.C: Increasing the surface area of antacid increases the rate at which it dissolves in water.D: Stirring affects the rate at which antacid dissolves in water more than its surface area.

Jack prepared a structured experiment in which the independent variable is the surface area of the antacid and the dependent variable is the time taken for the antacid tablet to dissolve.

The experiment was carefully controlled because the volume of water used, stirring time and temperature were all kept the same for the both systems.

Since the surface area of the antacid in glass 2 is higher than the surface area of the antacid in glass 1 so we can conclude that increasing the surface area of antacid increases the rate at which it dissolves in water.

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