Liz+Foster

Different liquids pH vs. pH of the stomach

Problem: What liquids are the most acidic? Clarify. Ms. Miller

Background Research: I am doing this experiment to find out which liquids are the most acidic. I was also curious to see at what liquid would have the highest and lowest pH number.The difference between an alkaline and an acid is the amount of hydrogen ions they free. the unit pH refers to the substance's potential (p)for freeing hydrogen (H) ions. The pH scale goes from 0 to 14 and the number in the middle or 7 is known as neutral pH ( Maintain). The greater the potential, the lower the pH number. The higher the pH number, the lower the potential ( Edgren). Zero is known as absolute acidity and the range of acidity is from 0 to 6. Fourteen is the state at which no hydrogen ions are released, or total alkalinity, and the alkaline scale is from 8 to 14 ( Maintain). Physicians take a strongly acidic pH in the body very seriously, even though dietitians don’t (Challem). (this is a topic I also found interesting, good background information. - allison schott) Is it safe to perform this experiment on a human?-Your favorite Noah Hahn Also I volunteer-Your favorite Noah Hahn

How are you planning to test the changing pH of the stomach? Ms. Miller

Hypothesis: If the pH balance of a liquid is lower than 7, then the pH balance of the liquid will be acidic.

Materials: 5 beakers - $3.70 for pk of 12 Diet Pepsi - $4.69 for pk of 12 Diet Dr Pepper - $5.50 for pk of 12 Dr Pepper - $5.50 for pk of 12 Sprite - $4.89 for pk of 12 Lemonade - $5.99 for pk of 12 pH strips - $8.97 for pk of 80 Total - $40.00

Methods: 1. Collect all materials. 2. Label a beaker Diet Pepsi, Diet Dr Pepper, Dr Pepper, Sprite, and Lemonade. 3. Pour a can of diet Pepsi into the beaker that is labeled diet Pepsi. 4. Dip on of the pH test strips into the beaker and pull it out. 5. Wait a while and then compare the color of the paper with the key and record the number that is next to the color it matches. 6. Pour a can of diet Dr pepper into the beaker that is labeled diet Dr pepper. 7. Repeat steps 3 and 4. 8. Pour a can of Dr pepper into the beaker that is labeled Dr pepper. 9. Repeat steps 3 and 4. 10. Pour a can of sprite into the beaker labeled sprite. 11. Repeat steps 3 and 4. 12. Pour a can of lemonade into the beaker that is labeled lemonade. 13. Repeat steps 3 and 4. 14. Compare the pH of the liquids to the pH of the stomach.

On steps 7, 9, 11, & 13 do you mean repeat 4&5?- Keyleigh Sutton
How will you know the pH of the stomach?- Keyleigh Sutton I am very confused as to what you are doing here. Are you just testing the pH of different liquids? Ms. Miller

How will you know the pH balance of the stomach?-Trey Keeley Step 3 that you keep repeating involves diet soda? I thought you wanted to test different liquids?-Trey Keeley

Bibliography Challem, Jack. "Do you pass the acid test? The secret to health is spelled with a pH--learn why Acid-Alkaline balance really matters." Better Nutrition Mar. 2010: 36+.Student Resources In Context. Web. 18 Oct. 2013.

Edgren, Altha Roberts. "Metabolic Alkalosis." The Gale Encyclopedia of Medicine. 3rd ed. Vol. 3. Detroit: Gale, 2006. 2428-2429. Gale Virtual Reference Library. Web. 18 Oct. 2013.

"Maintain the proper pH balance with diet, to be healthy." Spectrum; St. George, Utah. 10 Sept. 2013: 3. eLibrary. Web. 18 Oct. 2013. (what where website addresses to your work cited? -allison schott)