Question

DATA: Name of Antacid: __Tums( sodium carbonate_)________________

Recommended dose: _2-3 tablets__________________ Molarity HCl used: _0.9826___________M

Molarity NaOH used: ___1.003_________M

Mass of Tablet 1: __2.5912______________ g

Initial HCl buret reading: ________4.00________ mL Initial NaOH buret reading: __0______________ mL Final HCl buret reading: _____34.00___________ mL Final NaOH buret reading: 11.04_____________ mL Volume HCl added: _30.00________ mL Volume NaOH added: _11.04_______________ mL

Mass of Tablet 2: _2.5937_______________ g

Initial HCl buret reading: __0__________ mL Initial NaOH buret reading: __0______________ mL Final

HCl buret reading: __30.00__________ mL Final NaOH buret reading: _____9.02___________ mL

Volume HCl added: ___30.00_____________ mL Volume NaOH added: _9.02_______________ mL

Beaker 1 Beaker 2

Moles H+ used to dissolve tablet: ________________moles ________________moles

Moles OH? used to titrate excess: ________________moles ________________moles

Moles H+ neutralized by tablets: ________________moles ________________moles

Average moles H+ neutralized per tablet: ________________moles/tablet

Average moles H+ neutralized per gram of tablets: ________________moles/g (use the average tablet mass)

1. Write the balanced net ionic equation for the reaction of HCl with the active ingredient in your tablet.

Active Ingredient(s): __________________________ ________________________________________________________________________________ 2. Calculate the cost of neutralization in dollars per mole of acid neutralized by one tablet.

(cost per tablet: _$7.28 for a 1000 tums tablets_____________) Answer: __________________________

3. (a) Using the mass of active ingredient (antacid) per tablet found on the antacid container, calculate the volume of 0.10 M HCl that can be neutralized by one tablet.

(b) Assuming that the density of 0.10 M HCl is 1.0 g/mL, what mass of 0.10 M acid can be neutralized by one tablet? (c) Determine the ratio of the mass of the HCl(aq) solution to the mass of one tablet. (average of your 2 tabs)

(a) Volume 0.10 M HCl ______________

(b) Mass 0.10 M HCl _______________

(c) Number of times its weight ______________ (show calc's below)

4. Calculate the mass of ACTIVE INGREDIENT per tablet based on your moles of H+ neutralized per tablet. Compare with the information given on the label. (Formula of ACTIVE INGREDIENT: ___________ ) Answer: ___