P h value in exposed common drinks
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The pH values of common drinks like Coke, milk, apple juice, black coffee, and lemon tea were measured before and after being exposed to the environment for one week. The pH of all drinks decreased after one week of exposure, with the largest decreases in apple juice, lemon tea, and milk. The hypothesis that the pH of drinks would change with exposure over time was accepted.
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Let's think step by step:
pH = -log[H3O+]
10 = -log[H3O+]
10-10 = [H3O+]
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The answer is 3.
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pH = -log[H3O+]
10 = -log[H3O+]
10-10 = [H3O+]
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P h value in exposed common drinks
- 1. pH Value In Exposed Common Drinks AHMAD NUR FAIZ BIN ABU BAKAR D20101037414 MUHAMMAD SHAMIM BIN ZULKEFLI D20101037460 SITI RUKAIYAH ABD FATAH D20101037479
- 2. ph value of common drinks will change when exposed to surrounding
- 3. Engage Do the pH value of common drinks will changes when the food are exposed to environment in long period of time.
- 4. Empower Methods Results
- 5. Take 50 ml of liquid sample 1. Gently agitate the pH probe in each liquid for a minute or two while the pH reading settles then record the reading in the table A. Then, the liquid leaves for a week. The experiment is repeat for each other drinks water sample. NOTE : Take care to thoroughly clean the pH probe in a large container of water between each liquid to reduce cross contamination of the liquids. After a week, the pH of the liquids is taken.
- 6. HOME
- 7. Food Sample pH pH (after a week) Coke 2.61 2.24 Milk 6.76 4.40 Apples juice 3.49 1.84 Black coffee 5.51 5.42 Lemon tea 3.73 2.65
- 8. Graph of pH Before vs pH After a Week 7 6 5 4 3 2 1 pH 0 pH (after a week)
- 9. The value of the common drinks are changes especially apple juices, lemon tea and milk. This because when this liquid are exposed to surrounding to long period of time, the liquid maybe will stale. Besides, this liquid always will exposed to the temperature. The changes of temperature will changes the pH of liquids.
- 10. The hypothesis was accepted. The pH of all liquid sample was changes although in small amount of changes. Many factors that can make the pH of liquids sample changes for example temperature. Maybe the liquids sample was contaminated by bacteria or others at surrounding.
- 11. Enhance To determining tooth decay and dental erosion. Dental erosion occurs when tooth enamel (and dentine) are destroyed by the action of acid on teeth. This is a different process to the damage caused by acid from decay producing bacteria. Unlike tooth decay, erosion affects the whole surface of the tooth. Exposure to acid over a long period of time leads to progressive loss of enamel with the effect that the tooth ‘shrinks’ and crumbles at the biting edge. Eventually the dentine is exposed leading to pain and sometimes death of the tooth. Several common drinks fall below the ‘safe’ recommended pH level of 5.5. In order to minimize damage the following dental recommendation should be followed.