Increasing the surface area of a reactant does not only increase the quantity of material available to react, but will also increase the rate of the reaction. Take four antacid tablets out of their packages.Four clear 12-ounce (or larger) drinking glasses.Effervescent antacid tablets (at least four).In this activity, you will demonstrate this effect by measuring the rate of a different kind of chemical reaction: the dissolution of sodium bicarbonate from an effervescent antacid tablet in water. ![]() Take care not to break them, as the tablets are very brittle. Put one whole antacid tablet aside for now.Take the second tablet and break it into half and set both halves aside.Take the third tablet and break it evenly into quarters.Take the fourth tablet and ground it into a powder.įirst, break it into halves and then break the halves again into two parts. ![]() To do this, put the tablet to be ground inside a clean, folded piece of paper. Place the folded paper on a solid surface and use a spoon to carefully crush the tablet into a powder.
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