After last week's lesson on acids and bases, this week we tested a few different antacids to see which one works best. First we discussed what antacids are and what "best" might mean for an antacid. Then we discussed how we would go about measuring this. The kids ground up each tablet and added it to some hydrochloric acid - that's the same strong stuff you find in your stomach that sometimes causes heart burn. Finally we measured the pH to see which antacid was best at neutralizing the HCl.
This week's experiment was more than just an exploration of antacids. It also modeled the types of science projects the kids will be carrying out for this year's science fair. Working in pairs, the kids will choose some product to test and then design an experiment that will shed light on which of 3 different brands is best by the kids' definition. Stay tuned...
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