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Practical Report Which antacid tablet is the most effective in…
Practical Report
Which antacid tablet is the most effective in neutralizing stomach acid?
Background Information
Structure
How does it work?
Antacid tablets work by using a basic substance to counteract stomach acid, which neutralises it and hence provides relief from heartburn symptoms.
equation of reaction
What are antacid tablets?
An antacid is a substance that neutralises stomach acid, in order to reduce indigestion, heartburn and upset stomach. Symptoms include a burning sensation in heart or chest, a sour taste in the mouth, difficulty swallowing and nausea.
Method
Calcium Carbonate [CaCO3] is found to be the most effective with a very high neutralizing power. It can neutralize stomach acid
Active ingredients
found in antacid tablets
Calcium Carbonate (500mg)
Aluminum hydroxide (800 mg)
Magnesium hydroxide 800 mg
Risk Assessment
Disposal
Pour chemicals down the sink once practical has been completed
Thoroughly rinse & clean all equipment used
Dispose of gloves in bin and return safety glasses and aprons to their allocated places in the lab
Risks
Working with acidic & basic substances
Universal indicator may stain skin
Precautions
Use gloves, protective eyewear and an apron to avoid contact with acidic & basic substances
Emergency Procedures
If acids or bases come in contact with skin or eyes, rinse thoroughly with water
If acids or bases are spilt, clean the area with water and paper towels to eliminate any risks
Variables
Dependent
Change in stomach acid's PH
Time taken for the antacid to react
Independent
Type of antacid used
Controlled
Amount of acid used
Amount of base in capsule
Type of acid used
Factors that will affect the results of the experiment
Materials
Concentration of acid
Amount of base used
External factors
Temperature
Air conditioning
Heating
Sunlight
Proximity to windows (sunlight)
Method
Limitations
Access to materials
Access to equipment
Possible Errors
Random
Incorrect PH measurement (colour of universal indicator/test strip may be subjective, depending on the person who measures it)
Time recorded for the antacid to react may be slightly innacurate (human reaction time to start & stop the timer affects results)
Systematic