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If you haven’t done so already, please fill out  this survey (open in NEW TAB) on what Environmental Applications you want to learn most about in Module 7.

About how long did you spend working on Module 4 (including watching videos)?

Which factor influences organic matter decomposition the most: chemical composition or protection? Why? Give 2 examples of how the factor or process that you chose works.

Sort the molecules according to their longevity in soil (1 = shortest lasting; 4 = longest lasting). Assume all other factors are equal.

Over the course of soil development from parent rock to highly weathered soils, mineral weathering reactions occur that alter the surface chemistry of the soil.  Consider the weathering transformation sequence: muscovite/biotite → illite → vermiculite → smectite → kaolinite → gibbsite During the above weathering sequence, what general changes would be expected in following mineral chemical characteristics? Why? (a)  Permanent (structural) charge (b)  pH dependent (variable) charge (c)  Types of surface functional groups (d)  Cation exchange capacity (e)  Anion exchange capacity

A water sample is found to contain Cu but no organic or inorganic ligands except OH-. Assume that only one hydrolysis species contributes significantly to the total Cu in solution.          K        log Kf Cu2++H2O⇌Cu(OH)++H+{“version”:”1.1″,”math”:”Cu2++H2O⇌Cu(OH)++H+”} 10-7.52 -7.52    If [Cutotal] = 10-{T} M and pH = {pH}, what is the concentration of free Cu2+ in the water sample?  Format answer in scientific notation and round to 3 significant figures. Place the order of magnitude (x10^y) in the “units” box with no spaces (D2L doesn’t have a separate spot for this), followed by the units. For example: x10^-4 mol/L.

Water found in the pores of a soil has the following properties: Negligible ionic strength (activity = concentration) a constant pH of {pH} (Ca2+) = 10{Ca} M total P = 10{P} M Given the dissolution reaction of brushite is written: CaHPO4·2H2O(s)   +  H+ (aq)  ⇄   Ca2+(aq) +  H2PO4– (aq) +  2H2O   …and that H3PO4 has a pKa2 of 7.21, calculate log(IAP) (same as log(Q)) of the reaction, and save your answer for the next question.

Which of the following images shown below demonstrates the correct way to place a lateral view of the canine elbow onto the screen for evaluation by your clinician? Assume that the R marker in each image is placed correctly. To answer this question, select A, B, C, or D. A.   B.   C.   D.

You are evaluating a radiograph like the one shown in the image below for mAs and kVp. You see that the image is overall too dark. You cannot see the structures within the abdomen at all. The lumbar vertebra, ribs, and pelvis are visible but appear darker than they should.  The density of air and the density of the metal marker are appropriate.  Which of the following adjustments do you need to make to improve the radiograph technique for this image?

Rate how strongly you agree or disagree with the following statement: “I feel prepared to explain how chemical composition of organic and inorganic components of soil and water bodies influence chemical processes therein”