KOREA 2020 Study Guide - Midterm Guide: European Route E47, Aleste

ct(s) of t Draw The P or= assignment-take&take nmentSes sionLocato Draw the product(s) of the foll owing reactı 1. BH3/THF H3C-C-CEC-H 2 H0/aqueous Nad / aqueous NaCH . You do not have to stereochemi e to explicly ahe - sign from the drop-down curs, draw the org ate multiple product You do If no reaction oc not have t o ex starting material.

11, x(t) = Ce": x(0) = 5 12. P=C/t; P = 5 when t 3 13, y v2tfC; the solution curve passes through (1,3) Satishes the equation dP dt 7. Use implicit differentiation to show that za + y2 = r2 is T. 21S 13. a solution to the differential equation dy/day.14. Q 1/(Ct +C);:Q 4 when t 2 Problems 15. Show that y = A + Cekt is a solution to the equation 18. Suppose Q = Cekt satisfies the differential equation dy =k(y-A) dt -0.0302 dt What (if anything) does this tell you about the values of C and k? 16. Find the value(s) of w for which y cos wt satisfies 19. Find the values of k for which y z2 + k is a solution dt2 to the differential equation 17. Show that any function of the form Ci cosh wt + C2 sinh wt 20. For what values of k (if any) does y-5+ 3eka satisfy z the differential equation satisfies the differential equation x,,-w2x = 0. ey=10-2y dx

Part BA Solubility Equilibrium and Ku Equilibrium system: PbCl2 (s)Pb (a) 2 CI (a) Observations Step 4 Step 5 Step 6 Sten 7 Observations upon placing the test Step 9 SntD he Powo)o olution e Precipitate Observations upon addition of just 1.0 mL Total volume of HCI required for noticeable precipitation 1.0 Observations upon placing the test e tube with precipitate in hot water d ssalve tube wih precipitate ins precipitate Come back Volume of water added to just dissolve mL Step 9 PbCla precipitate mL Step 10 Total solution volume upon completion 13 Analysis .Why didn't any solid PbCl, form immediately upon addition of 1 mL of HCI (aq) in Step 4? What condition must be met by [Pb '] and [Cr] if solid PbClh is to form? . Consider your observation in hot water in Step 6: - In which direction did the equilibrium shift? - Did the value of Ksp get smaller or larger? - Is the dissolution of PbCl2 (s) exothermic or endothermic? Explain below.