What are the two antacids we will be investigating in this experiment? What is t

Question

What are the two antacids we will be investigating in this experiment? What is the major ingredient of each? (You may want to consult the label.) Find a commercial antacid other than Tunes* and Rolaids*. Look at its label and identify it below. List below the names and formulas of its active ingredients. Assume a student used a 25.00-ml. volumetric pipette to deliver 3 portions of 0.1105 M HCI(aq) to a beaker. How many moles of HCI did the student deliver to the beaker? In performing this experiment, assume that you weighed out 0.215 g of an antacid sample. After performing the titration, you determined that 0.003181 moles of HCI were needed to neutralize the antacid. How many grams of HQ were neutralized per gram of the antacid? Show all your work below with the correct unit* and significant figures.

Explanation / Answer

1. Anatacids we would be investigating here are CaCO3 and Mg(OH)2.

2. Tums have CaCO3 as the active antacid ingedient and Rolaids have Mg(OH)2 as the active ingredient.

3. moles of HCl = molarity of HCl x volume of HCl

                          = 0.1105 M x 25 ml

                          = 2.7625 mmol

4. antacid weight = 0.215 g

moles HCl used = 0.003181 moles

grams of HCl neutralized per gram acid = 0.003181 x 36.46/0.215

                                                                = 0.54

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