4.
(a) Fe2+(aq) + MnO4–(aq) ====> Fe3+(aq) + Mn2+(aq)
reduction : MnO4–(aq) + 8 H+ (aq) + 5e ====> Mn2+(aq)+ 4 H2O (l)
Oxidation : Fe2+(aq) ====> Fe3+(aq) + e
------------------
Overall (in acid ) :
MnO4–(aq) + 8 H+ (aq) + 5 Fe2+(aq) ====> 5 Fe3+(aq) + Mn2+(aq)+ 4 H2O (l)
Overall (in Base ) :
MnO4–(aq) +4 H2O (l) + 5 Fe2+(aq) ====> 5 Fe3+(aq) + Mn2+(aq)+ 8 OH- (aq)
(b)
Al (s) + MnO4–(aq) ====> MnO2 (s)+ Al(OH)4-(aq)
reduction : MnO4–(aq) + 4 H+ (aq) + 3e ====> MnO2 (s) + 2 H2O (l)
Oxidation : Al (s) + 4 OH- (aq) ====> Al(OH)4-(aq) + 3e
------------------
Overall :
Al (s) + MnO4–(aq) + 2 H2O (l) ====> MnO2 (s) + Al(OH)4-(aq)
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Answer these post lab questions when given experimental data and procedures. A REDOX TITRATION POST-LAB QUESTIONS LABORATORY 10 Name Date Section 1. Why can't the usual citration equation, MV. = MV be used asualtitration equation, MV M V.be used for this titration to get the moles of iron used: 2. Write the balanced chemical equation and label where the reduction and oxidation are occurring. 3. Using the chemical reaction, explain how the end point of the titration is detected. 4....
POST-LAB QUESTIONS Show all work for full credit 1. Physical and chemical properies are not exactly the same as physical and chemical changes. Explain the differences. 2. When an acid is added to sodium bicarbonate, CO, gas is formed. When dry ice sublimes Co,gas is formed. One process is chemical and the other is physical. Explain 4 Physical vs. Chemical- You Decide: Post-Lab
Part E: Post-lab Questions 1. Label the skeleton (Figure 6-11) with all the bones you identified in Part A. FICURE 6-11 Skeleton, anterior view.
E8: Post-lab Questions Homework . Due in 3 days 0/4 answered E8 PL 04 Homework – Unanswered Why is it important for all of your glassware to be clean and dry before performing a titration? I Unanswered Sul [ Fullscree
Help, please! 9) 25mL of 0.10M Zn(NO3)2 is added to 10. mL of 0.65M NaOH. Find Kc for: (See exp. 4 and dry lab/exp.6) Zn^2+ + 40H^--> Zn(OH)402- if pH of the solution is found to be 9.79 9) 25mL of 0.10M Zn(NO3)2 is added to 10. mL of 0.65M NaOH. Find Kc for: (See exp. 4 and dry lab/exp.6) Zn^2+ + 40H^--> Zn(OH)402- if pH of the solution is found to be 9.79
Give the iupac naming including stereochemistry for all three Lab Day Mo Homework #4 reinforces the concept of: stereochemistry of alkanes and cyeloalkanes. la. Circle the chiral center(s) in each compound shown below. CH3 Br 09 Br CH3 CH2CH3 C(CH3)3 lb. Assign IUPAC names the compounds above according to the IUPAC rules of nomenclature. Include stereochemistry!
3. Analyze the 1H NMR spectrum of the molecule shown below, labeled "NMR for post-lab 3". Assign all of the peaks in the spectrum. но OMe NMR for post-lab 3 2 X 38000 H3MBAkoho 1o hd LabCroup Deboe -36000 -34000 32000 30000 -28000 26000 + -24000 22000 20000 18000 -16000 -14000 -12000 -10000 -8000 -6000 4000 -2000 -2000 6 13 7 10 12 11 15 14 16 f1 (ppm)
CHEM 2001 Exp post lab Staple this to the post lab grade sheet... 5. Calculate the theoretical yield for this reaction using measurements from procedure. 6. If you obtained an actual yield of 0.57g. what is the yield? 7. What IR absorptions do you expect for the starting material (only in the functional group reg 4000cm to 1500cm)? 8. What IR absorptions do you expect for the product (only in the functional group region 4000cm 1500cm-')? to 9. If you...
D. ASIGNACIÓN DE POST-LAB (CAP 10, 11) 1. Escriba la estructura y el nombre IUPAC de los dos isómeros de constitución (CH14) que se producen al calentar el alcohol mostrado con H2SO4. (8) Estructura Nombre IUPAC H2SO4 OH calor