2023-10-25 17-05 1

Quiz - Soil Colloids / CEC Name Individual score: Disc, Instructor Team score: (e, Disc. Time ? Total score: Al . For.t'hwa Ps: [Objectives 3,5, 6,9, 11): S Question gircte your group number: p Myour clay mineral is Kaolinite Broup 2 your clay mineral is |llite (Hydrous mica) — Group 3 and 4 your clay mineral is Montmorillonite Sketch a < R imple diagram below to @ 2:1] o Struct naram be e 1 s \evourdiyminerdls f PR 2:1 ] clay? (Circle one) [a-d = 0.2 pts each] clay min.eral. Make sure to clearly distinguish between tetrahedral and € Octahedral sheets. Be sure to label ) tsyourcay mineral expanding OF the tetrahedral and octahedral sheets. [0.3 pts] g‘\:‘,m\ ¢) Whatis P¢ of your clay mineral? (Circle one) [0.2 pts] Y OR 40 cmolc/kg OR 100 cmolc/kg OR 200 cmolc/kg | T M»*“"‘"‘fi‘ W [10 cmolc/kg R 17 cmolc/kg OR 19 cmolc/kg] W \ e) You have a soil that is 3% OM, 10% kaolinite, 5% illite, and 4% [0.9 pts) \ % montmorillonite. Mt“iflm\ your soil? SHOW YOUR WORK! SN Logemif kapt OO Hagmoe | k ‘lbw\b/(bojé—p;\l‘: ‘W\"/kfi / %Mkfi*""g*%y,, /hty ¢ 1ernel [lhay ® 0. 0% flcmc% p i \‘30«0\01&? . All groups: [Objectives 10, 12]: You send your soil out for analysis and receive the following results: [a=1 pt; 0.2 each. b & ¢=0.3 each. d=0.4 pts, 0.2 each] Calcium 8.0 cmolc/kg of soil s OR agidic,r"’] (circle one) i i ha OR acidic ] (circle one) Magnesium 2.5 cmolc/kg of so!I &E@ i reeenel Potassium 1.5 cmolc/kg of soil W OR LA%4 ]‘ (C|-rce | %’ Hydrogen 3.0 cmolc/kg of soil [ basic OR \ (c!rcle one) ' Aluminum 2.0 cmolc/kg of soil [ basic OR @ (circle one) a) Next to each element above, circle whether it is a basic or acidic cation = T : b) Whatisthe total CEC? [ 14 cmolc/kg OR 20 cmolc/kg 6R 17 cmolc/kg Q 30 cmolc/kg ] Show work! 2 4,2,"’5"'\-; AL L > Y W\'(,/{“O ] ircle ne) Show your work! he % base satu 7 PR 77 OR 55.7% OR 58% ] (Circleo J i ati L ? [ 016% 4 R 08% C) What ist se satur 6570{*]" . < "lo.ges‘ = \ Te mate/ W d) Whatare 2 benefits of a high CEC? 1). less "8"“’“‘ Lo Po Ihshiaa, 2. ho'Bs Wobcients Qor P[us%‘§ % i R o / S