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kinetics of KMnO4 and H2C2O4
Post-lab Questions 1. One student uses a magnetic stirrer to stir...
Student Name Course/Section Date Instructor POST-LAB QUESTIONS I. Explain how each of the following experimental errors...
Student Name Course/Section Date Instructor POST-LAB QUESTIONS I. Explain how each of the following experimental errors would affect the value for the percentage of magnesium calculated in this experiment. (a) The sample was not dried completely at the end of the experiment. (b) A small piece of magnesium was lost after the weighing, but before the reaction was performed.
POST-LAB QUESTIONS Explain the effect on your calculated acid concentration if the following errors occurred 1....
POST-LAB QUESTIONS Explain the effect on your calculated acid concentration if the following errors occurred 1. A student left his or her buret funnel in the buret during the titration. 2. A student started their titration with air bubbles in the buret tip. 3. The dilute HCl was over-diluted in the volumetric flask. 4. The flask that the student added the dilute acid to before the titration was wet. Titration of an unknown Acid
Post Lab Questions 1. in a hurry to complete the experiment, the student failed to calibrate...
Post Lab Questions 1. in a hurry to complete the experiment, the student failed to calibrate the Spectrophotometer. As a result, all absorbance values for the standard solutions that are measured and recorded are too high. How will this affect the following calculations in Part B? a. Will the calculated equilibrium concentrations of FeSCN** be too high, too low, or unaffected? Explain. b. Will the calculated equilibrium constants be too high, too low, or unaffected? Explain. 2. In Part A,...
Post Lab Question for Kinetics 1. The rate of decomposition of azomethane (C2HsN2) is studied by...
Post Lab Question for Kinetics 1. The rate of decomposition of azomethane (C2HsN2) is studied by monitoring the partial pressure of the reactant as a function of time: CH3-N-N-CH3(g) -N2(g) + C2Hsg) The data obtained at 300 °C are listed in the following table: Time (s) 0 100 150 200 250 300 Pazomethane (mmHg) 284 220 193 170 150 132 Using Excel create Pc2HGN2 vs. t, In(Pc2H6N2) vs. t, and 1/Pc2H6N2 vs. t plot that should include linear regression trend...
Post lab Questions: 1. While performing the formula of hydrate laboratory experiment, the lid accidently slips...
Post lab Questions: 1. While performing the formula of hydrate laboratory experiment, the lid accidently slips over the crucible to completely seal the crucible. a. What effect this change will cause on your calculated experimental results? Explain. b. Would your calculated percent water of hydration be high, low or unaffected? Explain your answer. 2. A student was asked to identify a sample of unknown hydrate. Student was provided with the following experimental data. 3.51 g sample of the hydrate when...
POST-LAB QUESTIONS / HOMEWORK 1. A student performed the following osmosis experiment, similar to the one...
POST-LAB QUESTIONS / HOMEWORK 1. A student performed the following osmosis experiment, similar to the one you did, using a different combination of substances. Determine his/her results and explain them by answering the questions in the table by filling in the blank boxes. Assume that the dialysis bag is impermeable to sucrose. Set-up 1 Set-up 2 Set-up 3 Set-up 4 Set-up 5 Bags 15 mL in each Tap water Tap water 55% sucrose 21% sucrose solution solution Tap water Beakers...
Instructor Name: Student Name: EXP #4: PRE-LAB EXERCISE (there are questions on both sides) 1. Given the following...
Instructor Name: Student Name: EXP #4: PRE-LAB EXERCISE (there are questions on both sides) 1. Given the following data, determine the orders (m and n) with respect to the concentrations of A and B in the reaction A+ Bproducts Rate k[A]"[B* Time for reaction [BI [A] TAM 19 sec 0.020 M 0.020 M 19 sec 0.020 M 0.010 M 76 sec 0.010 M 0.020 M 76 sec 0.010 M 0.010 M Orders: n= m= What time would you predict if...
Student Name: Instructor Name: EXP #4: POST-LAB 1. A proposed mechanism for the iodine clock reaction...
Student Name: Instructor Name: EXP #4: POST-LAB 1. A proposed mechanism for the iodine clock reaction is shown below: Iodine Clock Reaction Mechanism: 1 HSoS0+HIO2 ki-2.95 x 10-1M-'s-1 2-2.0 x 1010 AM-2s-1 ka 1.0 x 105 M-'s-1 ka-3.0 x 105 M-3s-1 HIO2+I +H+2HOI HIO2+ HOI IO +I + 2H+ IO I+2H HIO2 + HOI HOI+I+H I2+H20 ks 3.0 x 1012M-2s-1 I+ H20 HOI+ I +H ke -2.2s-1 I2+HSO+H20+21 +SO- +3H+ -1.0 x 100 M-1-1 where the values of k are...
At Home Reaction Rates Lab Part I (Questions are of 5 points each. 1) What is...
At Home Reaction Rates Lab Part I (Questions are of 5 points each. 1) What is the relationship between concentration and the amount of product formed in a given time? Explain briefly. 2) What is the effect of temperature on amount of product formed with respect to time? Explain briefly 3) What relationship do you conclude about the effect of surface area on the amount of product formed in a given time? Explain briefly. Part II Reaction Rates 4. (10...
Part A and Part B. Also question #3-post lab. (its circled) A. Molar Solubility and Solubility Product of Calcium Hydroxide Trial I Trial 3 Trial 2 25.0 1. Volume of saturated Ca(OH), solution (m...
Part A and Part B.
Also question #3-post lab. (its circled)
A. Molar Solubility and Solubility Product of Calcium Hydroxide Trial I Trial 3 Trial 2 25.0 1. Volume of saturated Ca(OH), solution (mL) 2. Concentration of standardized HCl solution (molU/L) 3. Buret reading, initial (mL 4. Buret reading, final (mL) 5. Volume of HCI added (mL) 6. Moles of HCI added (mol) 7. Moles of OH" in saturated solution (mol) 8. (OH1, equilibrium (mol/L) 9. (Ca2 ], equilibrium (mol/L)...
Student Name Course/Section Date Instructor POST-LAB QUESTIONS I. Explain how each of the following experimental errors would affect the value for the percentage of magnesium calculated in this experiment. (a) The sample was not dried completely at the end of the experiment. (b) A small piece of magnesium was lost after the weighing, but before the reaction was performed.
POST-LAB QUESTIONS Explain the effect on your calculated acid concentration if the following errors occurred 1. A student left his or her buret funnel in the buret during the titration. 2. A student started their titration with air bubbles in the buret tip. 3. The dilute HCl was over-diluted in the volumetric flask. 4. The flask that the student added the dilute acid to before the titration was wet. Titration of an unknown Acid
Post Lab Questions 1. in a hurry to complete the experiment, the student failed to calibrate the Spectrophotometer. As a result, all absorbance values for the standard solutions that are measured and recorded are too high. How will this affect the following calculations in Part B? a. Will the calculated equilibrium concentrations of FeSCN** be too high, too low, or unaffected? Explain. b. Will the calculated equilibrium constants be too high, too low, or unaffected? Explain. 2. In Part A,...
Post Lab Question for Kinetics 1. The rate of decomposition of azomethane (C2HsN2) is studied by monitoring the partial pressure of the reactant as a function of time: CH3-N-N-CH3(g) -N2(g) + C2Hsg) The data obtained at 300 °C are listed in the following table: Time (s) 0 100 150 200 250 300 Pazomethane (mmHg) 284 220 193 170 150 132 Using Excel create Pc2HGN2 vs. t, In(Pc2H6N2) vs. t, and 1/Pc2H6N2 vs. t plot that should include linear regression trend...
Post lab Questions: 1. While performing the formula of hydrate laboratory experiment, the lid accidently slips over the crucible to completely seal the crucible. a. What effect this change will cause on your calculated experimental results? Explain. b. Would your calculated percent water of hydration be high, low or unaffected? Explain your answer. 2. A student was asked to identify a sample of unknown hydrate. Student was provided with the following experimental data. 3.51 g sample of the hydrate when...
POST-LAB QUESTIONS / HOMEWORK 1. A student performed the following osmosis experiment, similar to the one you did, using a different combination of substances. Determine his/her results and explain them by answering the questions in the table by filling in the blank boxes. Assume that the dialysis bag is impermeable to sucrose. Set-up 1 Set-up 2 Set-up 3 Set-up 4 Set-up 5 Bags 15 mL in each Tap water Tap water 55% sucrose 21% sucrose solution solution Tap water Beakers...
Instructor Name: Student Name: EXP #4: PRE-LAB EXERCISE (there are questions on both sides) 1. Given the following data, determine the orders (m and n) with respect to the concentrations of A and B in the reaction A+ Bproducts Rate k[A]"[B* Time for reaction [BI [A] TAM 19 sec 0.020 M 0.020 M 19 sec 0.020 M 0.010 M 76 sec 0.010 M 0.020 M 76 sec 0.010 M 0.010 M Orders: n= m= What time would you predict if...
Student Name: Instructor Name: EXP #4: POST-LAB 1. A proposed mechanism for the iodine clock reaction is shown below: Iodine Clock Reaction Mechanism: 1 HSoS0+HIO2 ki-2.95 x 10-1M-'s-1 2-2.0 x 1010 AM-2s-1 ka 1.0 x 105 M-'s-1 ka-3.0 x 105 M-3s-1 HIO2+I +H+2HOI HIO2+ HOI IO +I + 2H+ IO I+2H HIO2 + HOI HOI+I+H I2+H20 ks 3.0 x 1012M-2s-1 I+ H20 HOI+ I +H ke -2.2s-1 I2+HSO+H20+21 +SO- +3H+ -1.0 x 100 M-1-1 where the values of k are...
At Home Reaction Rates Lab Part I (Questions are of 5 points each. 1) What is the relationship between concentration and the amount of product formed in a given time? Explain briefly. 2) What is the effect of temperature on amount of product formed with respect to time? Explain briefly 3) What relationship do you conclude about the effect of surface area on the amount of product formed in a given time? Explain briefly. Part II Reaction Rates 4. (10...
Part A and Part B.
Also question #3-post lab. (its circled)
A. Molar Solubility and Solubility Product of Calcium Hydroxide Trial I Trial 3 Trial 2 25.0 1. Volume of saturated Ca(OH), solution (mL) 2. Concentration of standardized HCl solution (molU/L) 3. Buret reading, initial (mL 4. Buret reading, final (mL) 5. Volume of HCI added (mL) 6. Moles of HCI added (mol) 7. Moles of OH" in saturated solution (mol) 8. (OH1, equilibrium (mol/L) 9. (Ca2 ], equilibrium (mol/L)...
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