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  • 1. Noor Atika nti bi binti Ahmad Husnil nie ed 4 D Khatimah bin rha am 744 20101037449 tiMa oh 103 Hussin M 0 D 1 D 20 2010 1 037 45 2
  • 2.  Acids are substance that ionize in aqueous solution to form hydrogen ions Bases produce hydroxide ions (OH−) when they dissolve in water Acid and base have their own pH quantity
  • 3.  Neutralization is the process that involved between strong acid and also strong base in order to minimise the pH back to the normal
  • 4.  Susan are feeling pain in the upper part of the stomach and abdomen. After meeting with the doctor, he prescribed Susan with medicine called antacid What happen when base react with acid? How gastritis will occur? How antacid neutralise the pH to cure the gastritis?
  • 5. Objectives : To measure the rate of change in pH of a dilute hydrochloric acid (HCl) solution when antacid tablets are added to it. To compare the neutralization ability of different types of antacid tablet.
  • 6. Procedure : PART 1: Computer Setup1. Connect the Science Workshop interface to the computer, turn on the interface, and turn on the computer.2. Connect the DIN plug of the pH Sensor to Analog Channel A on the interface.
  • 7. Connectto thesensor .
  • 8.  PART II: Sensor Calibration and Equipment Setup1. Remove the pH electrode from its bottle of buffer solution. Connect the electrode to the pH Sensor amplifier. To connect the electrode, push the BNC plug onto the receptacle on the Sensor amplifier and turn the BNC plug clockwise until it ‘clicks’ into place.2. Use the wash bottle to rinse the end of the electrode. Soak the pH electrode in the beaker of distilled water for 10 minutes.3. In the Experiment Setup window, double-click the pH Sensor icon.
  • 9. 4. Calibrate with the high pH buffer solution.5. Thoroughly rinse the pH electrode with distilled water and dry it with a tissue.6. Calibrate with the low pH buffer solution.
  • 10. Experiment Setup :
  • 11. Result : Graph of pH versus time taken for antacids to reach final pH.1) Rennie :
  • 12. 2) Milk of Magnesia
  • 13. 3) Andrews Antiacid
  • 14. 4) Alka Seltzer
  • 15. Discussion : Stomach acid is highly acidic and has a pH of 1.6. Stomach acid is hydrochloric acid produced by the stomach. An antacid is any substance that can neutralize an acid. When an antacid is mixed with an acid the buffer tries to even out the acidity and that is how stomach acid gets neutralized.
  • 16.  Antacids perform neutralization reaction, i.e. they buffer gastric acid, raising the pH to reduce acidity in the stomach. In an antacid it is not the name brand that tells how well it works it is something called an active ingredient. Active ingredient of most of the antacids is bases of calcium, magnesium, aluminium.
  • 17.  Alka-Seltzer is a combination of sodium bicarbonate, potassium bicarbonate, and anhydrous citric acid, used for the relief of heartburn, acid indigestion, and stomach ache. Magnesium hydroxide is an inorganic compound with the chemical formula Mg(OH)2
  • 18.  Rennie contain calcium carbonate element in it. Andrew antacids is a combination of magnesium carbonate and calcium carbonate, used for the relief of upset stomach, heartburn, indigestion, and trapped wind.
  • 19.  What happen when base react with acid? When acid and base are combined, neutralization will occur. Neutralization occur because the acid and base properties of H+ and OH- are destroyed or neutralized
  • 20.  How gastritis will occur? Gastritis is an inflammation, irritation, or erosion of the lining of the stomach. Gastritis is due to high concentration of gastric juice in the stomach.
  • 21.  How antacid will cure the gastritis? Anti-acids are medicines containing bases such as aluminium hydroxide, Al(OH)3 and magnesium hydroxide, Mg(OH) 2 to neutralise the excess acid in the stomach Mg(OH)2+ HCl → MgCl + 2(H20)
  • 22.  Neutralize Bee and Wasp Stings have acidic toxins in their stings an alkaline solution should be applied to neutralize them which is baking soda mixed with cold water
  • 23. allows the monitoring of variables within avery small or very large timescale.capture data much faster and muchmore frequently than by the hand.allows for greater accuracy and precisioncomputer also can process enormousamounts of data very rapidly.
  • 24.  easier and less complicated than the manual steps
  • 25.  The data can be easily manipulated and presented in the form of clearly drawn graphs. The parallax error and human error in carrying out the experiment can be avoided resulting in accurate and precise data taken.