Using your own words, explain the differences between an acid and a base. Write
ID: 258360 • Letter: U
Question
Using your own words, explain the differences between an acid and a base.
Write out the following pH values in a logarithmic form. Indicate whether or not each value would be considered “acidic” or “basic.” If you are stuck, re-read the introduction to the assignment for an example:
pH Value (0 – 14)
Logarithmic Form
Acidic/Basic
2.5
4
6.7
8
12
14
What is the role of pepsinogen in human digestion? Does this explain any of the observations you made for this lab?
Did it surprise you to learn that the stomach doesn’t carry a pool of hydrochloric acid (HCl) all the time? Why would it make sense to make HCl “on demand” instead of just having it always present in your stomach?
In your own words, describe how the emission of fossil fuels is related to the production of acid rain.
Use internet resources to find one example of a national monument that has been damaged by acid rain. Write your observations in the space below. Provide the link to the image or insert the image with your answer below.
The ocean is not acidic, and model projections say the oceans won’t ever become acidic. So why do we use the term “ocean acidification” when CO2 is absorbed in a marine environment?
What ocean wildlife could be endangered by ocean acidification? Why?
What is a “buffer” solution? What role do you think this type of solution plays in the human body? In the environment? (You may use internet resources to look up the term)
Knowing that acid can be found in rain, do you suppose it could also be found in fog or snow? Defend your answer.
pH Value (0 – 14)
Logarithmic Form
Acidic/Basic
2.5
4
6.7
8
12
14
Explanation / Answer
7.Ans-
Ocean acidification means the lowering of pH of oceans by dissolving carbon dioxide in seawater from the atmosphere. The pH of seawater is greater than 7, therefore it is basic in nature in terms of pH. The increasing concentration of atmospheric CO2 causes the lowering of pH levels which acidifying the seawater.
8. Ans-
The ocean acidification may lead to change the marine ecosystems. The more acidic environment effect some calcifying species such as oysters, clams, sea urchins, shallow water corals, deep sea corals, and calcareous plankton. Because continuous ocean acidification causes the ocean become undersaturated that affect the organisms to produce and maintain their shells.
9.Ans-
A buffer solution is a mixture that consists of a weak acid and its conjugate base.
Every reaction takes place in the blood plasma. If the pH changes, these reactions do not take place. So, buffer system helps in maintain this pH in the blood and also play a major role in the anatomy of every human being.
Buffer system also plays important role in nature. The buffers present in soil depends on its organic and mineral content to maintain the pH of soil that is important to provide the nutrients for growth of different crops and vegetation. In bacteriological research culture, bacteria need a constant pH that maintains the buffer solution.
10. Ans-
Acid rain consists of sulfuric or nitric acid that deposit in wet or dry forms. The acidic rain flows over the ground which affects a variety of plants and animals that include rain, snow, fog, hail or even dust that is acidic.
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