To make 3 different antacid tablets and determine which antacid tablet is the most effective in neutralising acid in the stomach? (Rachael, Luke, Joseph)
Risk of the solution remain in the container. Please ensure all acid after reaction solution have been clean it may put others in risk.
Limitations
Variables
Factors Affecting Dependent Variable
Background Information
Independent - The type of base (antacid ingidient)
Dependent - the amount of time that is taken for the HCl to neutralise
Controlled - The amount of total substance/s per capsule. The amount of HCl.
Uncontrolled - paralax error,
key definition of the chemical terms
Definition of the antacid tablets: Antacid tablets are the drugs that help to reduce indigestion and heartburn by neutralizing (counteracting)the acid in your stomach.
pH: The pH (power of hydrogen) of antacid tablets are high meaning they are basic materials. Thus they can react with acids to form a metal salt and water in a neutralisation reaction. They are corrosive and caustic. If the pH
Active ingredients: Antacids are a combination of various compounds with various salts of calcium, magnesium and aluminum as active ingredients.
How can "antacid tablet "actually measured:The "acid-neutralizing capacity" of an antacid is defined as the moles of HCl neutralized by one gram of the antacid. You will determine the "acid-neutralizing capacity" by reacting a known mass of antacid in excess HCl. You will know the concentration of the HCl as well as the volume.
Reaction Completion: The completion of hte reaction would be determined by a timer to keeep the test fair.
Temp.: The temperature in the stomach is 37 degrees celcius so we oould and should keep it close to that heating the acid. This would accelerate the reaction
Type of antacids: Mangnesium Hydroxide, Calciumm Carbonate, Sodium Hydrogen Carbonate, Sodium Carbonate, Aluminum Hydroxide
The chemical reaction of an antacid tablets:
Aluminum hydroxide[Al(OH)3]: Al(OH)3(s) + 3 HCl(aq) -----> AlCl3(aq) + 3 H2O(l)
Calcium carbonate[CaCO3]: CaCO3(s) + 2 HCl(aq) -----> CaCl2(aq) + H2O(l) + CO2(g)
Magnesium carbonate[MgCO3]: MgCO3(s) + 2 HCl(aq) -----> MgCl2(aq) + H2O(l) + CO2(g)
Magnesium hydroxide[Mg(OH)2]: Mg(OH)2(s) + 2 HCl(aq) -----> MgCl2(aq) + 2 H2O(l)
Sodium bicarbonate[NaHCO3]: NaHCO3(aq) + HCl(aq) -----> NaCl(aq) + H2O(l) + CO2(g)
Risk of shattering glass: Handle with care to minimize risk. No running in the lab!
Risk of acid in eyes and on skin: handle with care. wear proper safety equipment including gives to fully minimize risk.
The concentration of acid: Neccesary concentration of acid is 0.02 mol of HCl since it is quite weak like the scid in our stomachs. We may be given 0.1 mol Hcl so we would need a dilution method.
data
resources
time
click to edit