3 what happens to milk as more lemon juice is added

Info icon This preview shows pages 6–8. Sign up to view the full content.

View Full Document Right Arrow Icon
3. What happens to milk as more lemon juice is added? Explain your observation on the basis of the observed pH changes. The milk begins to spoil as more diluted lemon juice is added because the milk is becoming increasingly more acid and away from its natural pH state; its pH level is falling. 4. How does the soda-antacid relationship compare to the milk-lemon juice relationship? The soda-antacid relationship is basically a polar opposite of the milk-lemon juice relationship because it is increasing while the milk-lemon juice relationship is decreasing. Both appear to be reaching a plateau, however. 5. If some stomach upsets are caused by an excess of acid, why does chewing Rolaids tablets help to reduce the discomfort?
Image of page 6

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
The pH level of stomach acid is very low and sits at around 1.25. The addition of a Rolaids tablet would neutralize the stomach acid and relieve the stomach pains by causing the pH level in your stomach to rise to a more comfortable level. 6. How does a buffer work? A buffer has the ability to neutralize both an acid and a base by absorbing the effects of the pH changes and keeping the acid or base steady. 7. What are at least two examples of natural buffers? Natural buffers like lime in lakes help sustain life by keeping the natural state of the pH level in the lakes and protecting the pH level from changing by things like acid rain. Buffers also exist in milk, protecting it from bacteria that can decrease the pH level and cause the milk to sour. 8. What is the normal pH of blood in the human body, urine, saliva, and beer? The normal pH of blood in all of these things is 7.4. 9. During an autopsy, the Medical Examiner found that the deceased had died from a condition known as alkalosis. Alkalosis is a condition that occurs when the pH of the blood rises significantly above 7.45. Knowing that liquids in the stomach can pass into the bloodstream very quickly and knowing that the normal pH in a human stomach is between 1.5 and 3.5, the Medical Examiner examined the stomach and found the hydrogen ion (H + ) concentration to be 10 -12 moles/liter (0.000000000010 mole/liter). What was the pH of the stomach? Show all calculation. (Hint: pH=-log[H + ]) pH=-log[H + ] pH=-log[10 -12 ] pH=12
Image of page 7
10. At what pH do fish in lake ecosystems fail to reproduce? The reproduction of fish becomes adversely affected at a pH lower than 5.4.
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern