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Acid-Base Reactions Experiment 5

In: Science

Submitted By wendtdyl
Words 1764
Pages 8
Experiment 5, CH-201-051
Lab Date: 1/28/15
Due Date: 2/4/15
Dr. Paliwal

Acid-Base Reactions

The purpose of this set of laboratory experiments is to study the correlation between acids and bases by measuring and comparing their pH level. This can then be used to further evaluate the neutralization of acids with a base, such as stomach acid with calcium carbonate, antacid tablets.
Part B-1: Test pH of Laboratory Chemical Solutions
Name Chemical Formula Calculated pH of 0.010 M Solution Laboratory pH Test results (0.010 M)
Sodium Chloride NaCl 7 7.07
Ammonia 〖NH〗_3 10.62 10.15
Sodium Acetate 〖NaCH〗_3 〖CO〗_2 8.88 7.24
Hydrochloric Acid HCl 2.0 1.71
Ammonium Chloride 〖NH〗_4 Cl 5.63 6.58
Acetic Acid 〖CH〗_3 〖CO〗_2 H 3.38 3.33
Sodium Hydroxide, Lye, or Caustic Soda NaOH 12.0 11.68
Ammonium Acetate 〖NH〗_4 〖CH〗_3 〖CO〗_2 7.0 7.69

Part B-2: Test pH of paired Acid and Base solutions:
Compound Names Compound Formulas Measured pH of Equal volumes of Solutions
Hydrochloric Acid + Sodium Hydroxide HCl+NaOH 4.58
Ammonia + Acetic Acid 〖NH〗_3+〖CH〗_3 〖CO〗_2 H 9.05

Part B-3: Test pH of common Household items
Household Item Name: Test pH:
Lemon Juice 2.07
Ammonia 11.53
Mouth Wash 4.04
Vinegar 2.02

Part C- Testing Effectiveness of Antacids
Acid Solution Antacid Test #1 pH result Test #2 pH result
Diluted 20 mL of HCl solution to simulate Stomach Acidity none 2.45 Control Value 2.45 Control Value
Diluted 20 mL of HCl solution to simulate Stomach Acidity 0.20 grams of Topcare Brand 7.28 7.25
Diluted 20 mL of HCl solution to simulate Stomach Acidity 0.20 grams of Rolaid Brand 7.71 7.75

Active ingredients in Rolaid Extra Strength: 1000 mg calcium carbonate as well as 200 mg manesium hydroxide per 2.5 g tablet
Active ingredients in Topcare Regular Strength: 500 mg calcium carbonate per 6 g...

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