Rates of Chemical Reaction Lab
Iodination of Acetone
1- a student made up a reaction mixture consisting of 10 mL 4 M acetone, 5 mL 1.0 M HCl 10 mL 0.005 M I2 and 25 mL H2O.
- Why is the concentration of iodine so much lower than the other reactants?
3. How are time and rate related? How are 1/time and rate related?
4. What does it mean when someone says a reaction is “first order”?
5. In a reaction, A + B ® C, it is found that the reaction is first order in terms of A and B. What happens to the rate if the concentrations of A and B are doubled?
Homework Answers
Answer 2
Iodine is a reactant as well indicator in this reaction. Absence of iodine indicates that the reaction is completed. The end point is detected by absence of brown color of iodine. If concentration of iodine would have been more color would be darker and reaction time will be more. The color will take longer time to diminish. So, iodine should be less in amount.
Answer 3
Rate and time are inversely related. Higher is the rate, more will be the time required for completion of reaction.
Rate and 1/time will be directly related.
Answer 4
First order means that rate of reaction is directly proportional to concentration of reactant.
Answer 5
Rate = k[A][B]
If concentration of A and B are doubled rate will be four times.
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Rates of Chemical Reaction Lab
Iodination of Acetone
1- a student made up a reaction mixture...
A) in a reaction involving the iodination of acetone, the following volumes were used to make...
A) in a reaction involving the iodination of acetone, the following volumes were used to make up the reaction mixture: 10 mL 4.0 M acetone + 10 mL 1.0 M HCl + 10 mL 0.0050 M I2 + 20 mL H2O What is the total volume of the sample? V = ___ mL B) In a reaction involving the iodination of acetone, the following volumes were used to make up the reaction mixture: 10 mL 4.0 M acetone + 10...
1. The solutions below were mixed together to carry out the iodination of acetone at 250 °C. 5.0 mL of 3.4 M acetone...
1. The solutions below were mixed together to carry out the iodination of acetone at 250 °C. 5.0 mL of 3.4 M acetone 5.0 mL of 12 M HCl solution 100 ml. of 0.0074 M l solution 5.0 mL of DI HO If the reaction took 516 seconds to go to completion, then what is the value for the rate constant, k, for the reaction at 250 °C? The initial reaction rate is equal to the average reaction rate for...
co 4. A fourth reaction mixture was made up in the following way: ?? mL 4.0...
co 4. A fourth reaction mixture was made up in the following way: ?? mL 4.0 M acetone + 10 mL 0.0050 M 12+5 mL 1.0 M HCI + ?? mL H2O a. If the reaction is zero order in Iz then what volumes of acetone and water are needed in order to (1) double the iodine concentration compared to reaction one and (2) then proceed at the same rate as in reaction 1 (note that the concentration of iodine...
plz help complete my prelab heres the first page 3. A third reaction mixture was made up in the following way: 5 mL. 4.0 M acetone+ 5 mL 0.0050 M12+ 10 mL 1.0M HCI+5 mL H2O a. What were the initi...
plz help complete my prelab
heres the first page
3. A third reaction mixture was made up in the following way: 5 mL. 4.0 M acetone+ 5 mL 0.0050 M12+ 10 mL 1.0M HCI+5 mL H2O a. What were the initial concentrations of acetone, 12 and H' ion in the reaction mixture? b. It took 109 seconds for the 12 color to disappear from the reaction mixture when at the same temperature as in question 1. What was the rate...
Iodination of Acetone 1.What is reaction kinetics? 2. What variables can affect the rate of a...
Iodination of Acetone 1.What is reaction kinetics? 2. What variables can affect the rate of a reaction? 3. Given the rate law : Rate = k [A][B]3 if the concentration of B doubles how will that affect the rate? 4. For a mixture that is : 10mL 4.0M acetone, 10mL 1.0M HCl, 10mL 0.0050M I2, and 20mL water, what is the molarity of each substance IN the mixture?
Lab 20A lodination of Acetone Concentration SJBoylan2018 RATIO METHOD TO DETERMINE REACTION RATE MODEL You add...
Lab 20A lodination of Acetone Concentration SJBoylan2018 RATIO METHOD TO DETERMINE REACTION RATE MODEL You add 10 mL of 4.0 M acetone, 10 mL of 1M hydrochloric acid and 20 mL of water to a 125 mL Erlenmeyer ask. You mix the solution. Then you add 10 mL of 0.0050 M iodine to the flask, mix the solution and start a timer. At time equals zero the color of the solution is straw yellow with a hint of orange. This...
3. (30 pts. total) We discussed the iodination of acetone in class. An alternative, but equivalent,...
3. (30 pts. total) We discussed the iodination of acetone in class. An alternative, but equivalent, way of writing the reaction is: acid H3C-C-CH3 + 131 acetone triiodide H3C-C-CH2 + 21 + H* iodoacetone iodide Is provides a more useful way to introduce 12 into the system. Iz is also useful because it absorbs visible light, and the rate of the reaction can be monitored by measuring the decrease in its absorbance at 565 nm. (Any time you can measure...
4. A second reaction mixture (Mixture II) was made up in the following way 20.0 mL....
4. A second reaction mixture (Mixture II) was made up in the following way 20.0 mL. 4.0 M acetone + 10.0 mL 1.0 M HCI + 10.0 mL 0.0050 M 12 + 10.0 mL H20 What are the new initial concentrations of acetone, H' ion, and I2 in this second reaction mixture? Show your work! a. [acetone] M; [H'] M; [12] M It took 125 seconds for the l2 color to disappear from the reaction mixture when it occurred at...
4. If more Br ions are added to a saturated PbBr solution, will the reaction shift?...
4. If more Br ions are added to a saturated PbBr solution, will the reaction shift? If so, which direction? Explain why or why not (4) PbBry(s) Pb2+ (aq) + 2 Brjag) 5. Write the expression for the solubility product, Kp. of PbBr2 (2) 3. Use the provided experimental data to calculate the equilibrium constant, K, for the reaction given below. Note the stoichiometry is not all 1 to 1. (7) Include the units for K Collaq) + 2SCN (aq)...
please use the tables to solve the questions 2. Write the rate law for the reaction...
please use the tables to solve the questions
2. Write the rate law for the reaction based on the Part 1 experimentally determined exponents rounded to the nearest integer. Specify the order of the reaction for each of the components and the overall order. 3. Calculate the rate constant, k, with appropriate units for each reaction mixture using the experimental rate law. All work must be shown for Mixture 1 in order to receive complete credit. Complete Table Ri, below....
1. The solutions below were mixed together to carry out the iodination of acetone at 250 °C. 5.0 mL of 3.4 M acetone 5.0 mL of 12 M HCl solution 100 ml. of 0.0074 M l solution 5.0 mL of DI HO If the reaction took 516 seconds to go to completion, then what is the value for the rate constant, k, for the reaction at 250 °C? The initial reaction rate is equal to the average reaction rate for...
co 4. A fourth reaction mixture was made up in the following way: ?? mL 4.0 M acetone + 10 mL 0.0050 M 12+5 mL 1.0 M HCI + ?? mL H2O a. If the reaction is zero order in Iz then what volumes of acetone and water are needed in order to (1) double the iodine concentration compared to reaction one and (2) then proceed at the same rate as in reaction 1 (note that the concentration of iodine...
plz help complete my prelab
heres the first page
3. A third reaction mixture was made up in the following way: 5 mL. 4.0 M acetone+ 5 mL 0.0050 M12+ 10 mL 1.0M HCI+5 mL H2O a. What were the initial concentrations of acetone, 12 and H' ion in the reaction mixture? b. It took 109 seconds for the 12 color to disappear from the reaction mixture when at the same temperature as in question 1. What was the rate...
Lab 20A lodination of Acetone Concentration SJBoylan2018 RATIO METHOD TO DETERMINE REACTION RATE MODEL You add 10 mL of 4.0 M acetone, 10 mL of 1M hydrochloric acid and 20 mL of water to a 125 mL Erlenmeyer ask. You mix the solution. Then you add 10 mL of 0.0050 M iodine to the flask, mix the solution and start a timer. At time equals zero the color of the solution is straw yellow with a hint of orange. This...
3. (30 pts. total) We discussed the iodination of acetone in class. An alternative, but equivalent, way of writing the reaction is: acid H3C-C-CH3 + 131 acetone triiodide H3C-C-CH2 + 21 + H* iodoacetone iodide Is provides a more useful way to introduce 12 into the system. Iz is also useful because it absorbs visible light, and the rate of the reaction can be monitored by measuring the decrease in its absorbance at 565 nm. (Any time you can measure...
4. A second reaction mixture (Mixture II) was made up in the following way 20.0 mL. 4.0 M acetone + 10.0 mL 1.0 M HCI + 10.0 mL 0.0050 M 12 + 10.0 mL H20 What are the new initial concentrations of acetone, H' ion, and I2 in this second reaction mixture? Show your work! a. [acetone] M; [H'] M; [12] M It took 125 seconds for the l2 color to disappear from the reaction mixture when it occurred at...
4. If more Br ions are added to a saturated PbBr solution, will the reaction shift? If so, which direction? Explain why or why not (4) PbBry(s) Pb2+ (aq) + 2 Brjag) 5. Write the expression for the solubility product, Kp. of PbBr2 (2) 3. Use the provided experimental data to calculate the equilibrium constant, K, for the reaction given below. Note the stoichiometry is not all 1 to 1. (7) Include the units for K Collaq) + 2SCN (aq)...
please use the tables to solve the questions
2. Write the rate law for the reaction based on the Part 1 experimentally determined exponents rounded to the nearest integer. Specify the order of the reaction for each of the components and the overall order. 3. Calculate the rate constant, k, with appropriate units for each reaction mixture using the experimental rate law. All work must be shown for Mixture 1 in order to receive complete credit. Complete Table Ri, below....
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