CHM 101L M5 Equilibrium and LeChatlier Lab Report (1)

TABLE 3: FIND THE CHEMICAL EQUATION

What relative concentration do you want to select for determining λmax​? a. High end of the concentration range   b. Low end of the concentration range   c. Zero concentration

Using --> as a reaction arrow, please write the complete reaction for the second procedure

Formation of Silver Acetylide salt Get your third test tube of LPG and add 1 mL of Ammoniacal Silver Nitrate  Replace the cork immediately  Shake the tube and observe for the appearance of a precipitate. If a precipitate is formed, filter it.  Spread the filter paper on the asbestos pad of your wire gauze and heat. What are your observations? Was precipitate formed? What does the precipitate looks like? What happened to the precipitate when they were heated?

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Which of the following statements best describes the end point of the reaction and when you should stop the timer? Group of answer choices Once the purple color of the initial mixture, caused by the KMnO4, fades After 5 minutes have passed Once the KMnO4 has reacted completely with the malonic acid, turning the solution yellow Once the mixture turns colorless

Table 2:  Molarity of H2O2 and KI and Reaction Rate Trial H2O2 Concentration, M KI Concentration, M Reaction Rate(Reciprocal Slope) 1 0.29 M 0.40 M 14.08 2 0.29 M 0.20M 25 3 0.023 M 0.40 M 20     Please help me with this part, and please show me all steps  Order with respect to H2O2: Order with respect to KI:

A chemical engineer is studying the following reaction: H2(g)+I½(g) → 2 HI(g) At the temperature the engineer picks, the equilibrium constant K, for this reaction is 0.31. The engineer charges ("fills") three reaction vessels with hydrogen and iodine, and lets the reaction begin. He then measures the composition of the mixture inside each vessel from time to time. His first set of measurements are shown in the table below. Predict the changes in the compositions the engineer should expect next time he measures the compositions. reaction compound pressure expected change in pressure vessel H, 3.32 atm f increase I decrease (no change) A 3.04 atm f increase I decrease (no change) HI 0.76 atm f increase O I decrease (no change) H, 3.29 atm f increase I decrease (no change) В 3.01 atm f increase I decrease (no change) HI 0.81 atm f increase O 1 decrease O (no change)

Choose all that are definite evidences of  chemical reactions Group of answer choices Lighter color when colorless solution is mixed with a colored solution Precipititation Bubbles Evolution of heat

Dangerous Paint Stripper Jessica has a summer job working for the city parks program. She has been using a cleaner called “Graffiti Gone” to remove graffiti from the bathrooms. She has to take a lot of breaks, because the chemical makes her throat burn. It also makes her feel dizzy sometimes, especially when the bathrooms don’t have very many windows. On the label, she sees that the cleaner has methylene chloride in it. She feels like she’s managing to get the work done, but she is worried about feeling dizzy. She wants to find out more about this chemical, what harm it can cause, and whether there are safer ways to do this work. Questions for following story. 1. What went right in this situation? 2. What went wrong in this situation? 3. What steps should be taken in this workplace to make sure employees are better protected and prepared the next time?

Given the Ksp for Ag2CrO4 is equal to 1.20 x 10-12, calculate the percent error in your experimentally determined value for average Ksp (this will be an extremely large percentage – think about why).

Do not give handwriting solution.

Table 2:  Molarity of H2O2 and KI and Reaction Rate Trial H2O2 Concentration, M KI Concentration, M Reaction Rate(Reciprocal Slope) 1 0.29 M 0.40 M 14.08 2 0.29 M 0.20M 25 3 0.023 M 0.40 M 20   help me with this part please, and show me all steps    Order with respect to H2O2:    Order with respect to KI:

TABLE 4: FIND THE CHEMICAL EQUATION

EQUILIBRIUM & ACID & BASES  MULTIPLE CHOICE

Table D-3 Solution 1 2 3 0.2 0.2 0.1 [OH-] (M) [F] (M) 0.08 0.04 0.08 Average "Debluing" Rate (sec-¹) 0.056 0.02916 0.046

Please put the data in tabular format please Please please please answer as fast as possible

Instructions Complete the Post-lab for Lab 10 - Kinetics after completing the laboratory exercise. This post-lab is due before the beginning of the next lab meeting. Multiple Attempts Not allowed. This test can only be taken once. Force Completion This test can be saved and resumed later. Your answers are saved automatically. * Question Completion Status: Save and Submit L A Click Submit to complete this assessment. Question 10 Question 10 of 10 1 points Save Answer The lodine Clock Reaction where the solution turns blue-black at the end was the experiment performed three times in this lab to investigate the effect of concentration on rate of reaction. The experiment was then repeated for a fourth trial. The concentration of the H2O2 was decreased to 0.375 % and the concentration of Solution A kept the same as the three trials used in this lab experiment. The time of Trial 4 was 74.93 seconds from the moment the two solutions were mixed until the solution turned blue-black. Keeping in…

For questions 12-13, refer to the following table. Enzyme carbonic anhydrase fumarase ribonuclease 12. 13. acetylcholinesterase KM (mol/L) 2.6 x 10-2 5 x 10-6 Kcat (S-1) 4 x 105 800 7.9 x 10-3 9.5 x 10-5 790 1.4 x 104 (1 point) Calculate the initial reaction velocity for acetylcholinesterase (corresponding to the initial few percent of substrate consumed). Assume a total enzyme concentration of 1 nM and substrate concentration of 100 mM. Show your work. (1 point) For ribonuclease, what concentration of substrate is needed to produce half the velocity that would be obtained in the limit of an "infinitely high" concentration of substrate?

By dispersing the palladium onto carbon, the surface area of the catalyst decreases and helps accelerate the reaction. Group of answer choices True False

Q1

Cinnamon is made up of a mixture of many compounds.  Cinnamaldehyde is the component responsible for cinnamon flavor.  Several of these compounds are also a potent antimicrobial compounds present in essential oils.  The following results were obtained for known concentrations of three of the compounds. Concentration (mg sample/200 uL) Cinnamaldehyde Eugenol Thymol 0.50   0.4   0.65     1.8 0.75 1.0 0.8   1.10   1.2   1.25 2.0     1.30     3.0 1.50   1.5   1.90 3.1 2.0 4.6 2.50 4.0   5.8   Determine the calibration curve equations for each component including regression. which component has the highest calibration sensitivity? A sample containing the three essential oils in part b gave the peak areas relative to the internal standard of cinnamaldehyde 2.6, eugenol 0.9 and thymol 3.8. Determine the concentration of each of the oils in the sample and the standard deviations.

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