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Section 1: Article Review;Read the following article (found at this URL http://www.scientificamerican.com/article/ants-mayboost-co2-absorption-enough-to-slow-global-warming/ and also posted on the Canvas page).;Answer this series of questions regarding the article or ideas included within the article. There;are a couple questions below that require you to list a reference or source. Be sure to use;credible references (which doesnt include any website that contains wiki).;1a. Provide a series of equations that explain why the calcium and magnesium containing bricks;mentioned in the article would be useful in the sequestration of CO2 from the atmosphere. (The;bricks are not elemental calcium or magnesium, so you might need to think about what;oxidation state (or common salts) the metals are in.);1b. Other Group II metals would likely react in the same manner. Select one of the other Group;II metals and explain why they are not commonly used. (Consider: rarity, toxicity, cost, reactivity;or other environmental concerns.) References required.;2a. As mentioned in the article, CO2 is the primary greenhouse gas emitted via human activities.;i.;Write the equilibrium reaction involving the reaction between CO2 and water.;ii.;Write a few sentences and include relevant chemical equations that explain what;compounds cause acid rain due to CO2 in the atmosphere.;iii.;Algea blooms (green goo) occur when the pH of a natural water system become out;of whack. Under what conditions do algea blooms occur (think: acid/base, pH;equilibrium, buffers)? Does the acid rain promote or retard the bloom? Why?;2b. Lets say the lake mentioned in question 2a is located in central Missouri, where;temperatures range from below freezing to near 100 F during the course of a year. How would;the effects of acid rain falling in this lake differ from a time point in early January to one taken in;late July? (think: equilibrium observations in lab related to temperature, pH, and equilibrium);3a. Formic acid is secreted by ants (this causes the little white head you get when bit by a red;ant).;i.;Provide the formula and Ka of formic acid (ref your sources).;ii.;Consider common household items (chemicals) that you might have under your;kitchen sink. Explain which item might reduce the pain related to an ant bite. What;would be your risks in using this item?;3b. The article mentions that it is unclear what role the ants actually play in sequestering CO2;but that the secretions of the ants could play a part. Explain whether it is feasible that formic;acid could be partially responsible for this phenomenon. Your explanation should include;balanced chemical equations. (think: Ka equations for formic acid, the CO2 conjugate acid, and;water, relative strengths (Ka values), and a little common sense.);4. Design an experiment that would allow you to determine whether the decomposition of the;mineral bricks mentioned in the article follows first-, second-, or third-order kinetics. (Hints: gas;pressure, mass. The big complication: the reaction is very slowHow do scientists work on;reactions that are very slow (i.e., decomposition of trash in a landfill.));5. Suppose two research groups are working to confirm Professor Dorns results. Consider the;following data sets and comment on the validity of results obtained from either research design.;What are the strengths and limitations of each design? (READ the scale on the axes.);Data is below.;Group A Data;Sample;Number;1;2;3;4;5;6;7;8;9;10;Group B Data;Depth Taken;(in cm);23.6;24.1;25.2;24.9;25.6;26.2;23.9;25.4;24.7;23.2;Sample;Number;1;2;3;4;5;6;7;8;9;10;Depth Taken;(in cm);10.6;95.4;72.8;28.1;35.7;42.8;78.5;82.1;14.6;61.3

 

Paper#15600 | Written in 18-Jul-2015

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