Analysis of an Antacid

Analysis of an alkaliser In this science laboratory report we leave discuss the results of the Determining the Most Effective Antacids lab. In this lab we tested different brands of antacids to find out which will be the most effective at neutralizing acids. We will test this by seeing how much drops of hydrochloric acid (HCl) are required to neutralize a definite amount of the antacid. Antacids are used to resist heartburn. We sometimes use them to treat this because antacids are a round the bend base that can neutralize acids in our stomachs, such as HCl.The purpose of this lab is to see how soundly each antacid neutralize hydrochloric acid. Procedure 1. Obtain two burets, one for use with the HCl and others for use with the NaOH. 2. figure the exact bulwarkarity as they appear on the stock bottles. 3. Determine the plurality of each of you antacid stamp pads. 4. Dispense 25 mL of HCl root into the Erlenmeyer flask, and then add one of the antacid tablets to the flask. 5. Bring the solution to a boil to dispel any undissolved CO2. 6. Add two or three drops of an index finger to our antacid mixture. 7.Titrate antacid mixture with the NaOH solution until we have reached the end point of the indicator used. Mass tablet VHCl Vinitial NaOH Vfinal NaOH moles HCl neutralized By antacid/ g tablet x? x ( x? x )2 1. 29 g 25 mL 0 mL 18 mL 0. 0055961 mol/g 0. 0024959 6. 22952*10-6 1. 221 g 25 mL 0 mL 17 mL 0. 0067452907 mol/g 0. 00134671 1. 8136*10-6 1. 24 g 25 mL 0 mL 18. 9 mL 0. 005083629 mol/g 0. 003 9. 050296*10-6 1. 273 g 25 mL 0 mL 16. 2 mL 0. 00714 mol/g 9. 52*10-4 9. 063*10-7 1. 289 g 25 mL 0 mL 15. 2 mL 0. 0078 mol/g 2. 2*10-4 8. 5264*10-8 1. 248 g 25 mL 0 mL 10. 6 mL 0. 01185 mol/g -0. 003758 1. 412*10-5 1. 29 g 25 mL 0 mL 9. 3 mL 0. 01243 mol/g -0. 00434 1. 8818*10 Average x? = 0. 008092 mol/g ? (x? x) 2 = 5. 102298*10-5 Standard Division = SD = ? x- x 2n-1 = 0. 0029161 A brand name Tums Safeway Safeway Phillips Tums Safeway ActiveIngredient CaCO 3 CaCO3 CaCO3 Mg(OH)2 CaCO3 CaCO3 G active voice particle from battle 0. 5 g 0. 5 g 0. 5 g 0. 311 g 0. 5 g 0. 5 g Calculated gActive ingredient 0. 911 g 0. 3718 g 0. 3548 g 0. 392 g 0. 285 g 0. 15 g moles HCl neutralized by active ingredient/g tablet 0. 00587 mol 0. 0060 mol/g 0. 00709 mol/g 0. 01345 mol/g 0. 00648 mol/g 0. 0081 mol/g Cost / g 4. 3835 ? /g 7. 35 ? /g 7. 50 ? /g 17. 83 ? /g 14. 011 ? /g 5. 16 ? /g Brand = Safeway regular strength Cost = $ 3. 99 tablets = 150 g active ingredient = 500 mg each tablet Ingredient = (active) calcium carbonate, (inactive) corn starch, crospovidone, dextrose, flavor, magnesium stearate, maltodextrin, sucrose, talc. CaCO3 (s) + 2HCl (aq) CaCl2 (aq) + urine (l) + CO2 (g) Calculation 1.Calculate moles HCl neutralized by antacid per one thousand tablet (Total moles HCl moles HCl neutralized by NaOH) / mass of tablet Total moles HCl = Moles HCl neutralized by NaOH = 2. Calculate grams active ingredient 3. Calculate cost/gram Based on the re sults, although Phillips brand was expensive, it was the most effective antacid. This is because it neutralized the most moles of HCl per gram of antacid. The active ingredient in this antacid is Magnesium Hydroxide. As the result, I prefer to buy Phillips antacid to resist heartburn. chemical substance Equation Mg (OH) 2 + HCl Cl (OH) 2 + MgH