KINETICS OF THE DECOLORIZATION OF CRYSTAL VIOLET BY SODIUM HYDROXIDE PRE-LABORATORY QUESTIONS The following preparatory questions...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
KINETICS OF THE DECOLORIZATION OF CRYSTAL VIOLET BY SODIUM HYDROXIDE PRE-LABORATORY QUESTIONS The following preparatory questions should be answered before coming to lab. They are intended to introduce you to several ideas that are important to aspects of the experiment. You must turn in your work to your instructor before you will be allowed to begin the experiment. 1. Complete the following table. Time (minutes) 0 3 6 9 12 Concentration of crystal violet, [R] 7.85 x 10-6 5.41 x 10-6 3.66 x 10-6 2.68 x 10-6 2.01 x 10-6 In[R*] Prepare three graphs using the attached graph paper: i) plot [R] (y-axis) versus time, ii) plot In[R] versus time, and iii) plot 1/[R] versus time. How do these three plots differ? Which is the most linear? 1/[R] 2. a. Write the equation which describes the reaction between crystal violet and hydroxide ion. b. A solution is prepared by mixing 25.0 mLs of 4.84 x 10 M crystal violet solution with 20.0 mLs of 0.10 M NaOH solution and diluted to a final volume of 100.0 mLs. Determine the limiting reagent. c. After the reaction has gone to completion, calculate the concentration of all species in the reaction. d. How does the concentration of sodium hydroxide change over the course of the reaction? e. Explain your answer in question 2d in terms of the initial concentrations of reactants. KINETICS OF THE DECOLORIZATION OF CRYSTAL VIOLET BY SODIUM HYDROXIDE PRE-LABORATORY QUESTIONS The following preparatory questions should be answered before coming to lab. They are intended to introduce you to several ideas that are important to aspects of the experiment. You must turn in your work to your instructor before you will be allowed to begin the experiment. 1. Complete the following table. Time (minutes) 0 3 6 9 12 Concentration of crystal violet, [R] 7.85 x 10-6 5.41 x 10-6 3.66 x 10-6 2.68 x 10-6 2.01 x 10-6 In[R*] Prepare three graphs using the attached graph paper: i) plot [R] (y-axis) versus time, ii) plot In[R] versus time, and iii) plot 1/[R] versus time. How do these three plots differ? Which is the most linear? 1/[R] 2. a. Write the equation which describes the reaction between crystal violet and hydroxide ion. b. A solution is prepared by mixing 25.0 mLs of 4.84 x 10 M crystal violet solution with 20.0 mLs of 0.10 M NaOH solution and diluted to a final volume of 100.0 mLs. Determine the limiting reagent. c. After the reaction has gone to completion, calculate the concentration of all species in the reaction. d. How does the concentration of sodium hydroxide change over the course of the reaction? e. Explain your answer in question 2d in terms of the initial concentrations of reactants.
Expert Answer:
Related Book For
Personal Financial Planning
ISBN: 978-1111971632
13th edition
Authors: Lawrence J. Gitman, Michael D. Joehnk, Randy Billingsley
Posted Date:
Students also viewed these chemistry questions
-
Which aspects of HRM do you feel are most important for the employee, supervisor, and HRM professional to be responsible for? Why?
-
A solution is prepared by dissolving table salt, sodium chloride, in water at room temperature. a. Assuming there is no significant change in the volume of water during the preparation of the...
-
How is sodium hydroxide prepared commercially?
-
Let a = (123) (45) = S, and b = (23) (14) = S5, then aba is equal to (13) (25) (135) (24) (15) (23) (123) (45)
-
Ashes Divide Corporation has bonds on the market with 14.5 years to maturity, a YTM of 6.8 percent, and a current price of $924. The bonds make semiannual payments. The coupon rate on these bonds...
-
At = 0.05, can you support the claim that the proportion of women ages 18 to 24 living in their parents homes was greater in 2012 than in 2000? Use the figure below, which shows the percentages of...
-
Using the Internet, find some government units having financial problems.
-
An automobile manufacturer is considering mechanical design changes in one of its top-selling cars to reduce the weight of the car by at least 400 pounds to improve its fuel efficiency. Design...
-
You are considering two possible investments. Investment A is an oil well expected to produce an annual cash flow of $14,000 in one year. The cash flow is expected to increase by 2 percent per year...
-
Construct annual incremental operating cash flow statements. Shrieves Casting Company is considering adding a new line to its product mix, and the capital budgeting analysis is being conducted by...
-
A company decides to advertise their product, another company in the same industry tends to advertise too. This is particularly true with the wireless service industry. For example: when AT&T decides...
-
A sleepwear buyer has an opening stock figure of $ 1 7 0 , 0 0 0 at retail, which carries a 6 1 % markup. On March 3 1 , new purchases since the start of the period were $ 9 9 0 , 0 0 0 at retail,...
-
Solve each of the following proportions. (a) 5: n=35:21 (c) 1.15 0.85=k: 1.19 (d) 3.60 m = 10.8:8.10 (e) 5 15 6 = 7 14 5 t (b) 10 6 30:x 86 54 (f) y: 9 = 45 8 4 64
-
Calculate. 21 7 30 6.251
-
To what extent are the cultural changes of these years a cause or consequence of America's industrialization in the late nineteenth century? Explain in detail how the rural beginnings of American...
-
In the current year K gifted shares of a public corporation to his spouse. The shares, that originally cost $ 1 0 , 0 0 0 , had a value of $ 1 5 , 0 0 0 at the time of the gift. During the year, K s...
-
Individuals face an increasing number of potential personal and workplace-related trauma throughout their lives. The Substance Abuse and Mental Health Services Administration (SAMHSA), a branch of...
-
In the simple quantity theory of money, what will lead to an increase in aggregate demand? In monetarism, what will lead to an increase in aggregate demand?
-
A company has total assets of $2.5 million, total liabilities of $1.8 million, and $200,000 worth of 8 percent preferred stock outstanding. What is the firms total book value? What would its book...
-
1. Calculate Cheryl Sterns taxable income, being sure to consider her exemption. Assume that the standard deduction for a single taxpayer is $5,800, and that each exemption claimed is worth $3,700....
-
Why do people borrow? What are some improper uses of credit?
-
Risk associated with investments can be categorized as diversifi able risk and undiversifi able risk. This is one reason mutual funds are so popularmany investors money is pooled and numerous stocks...
-
Americans do not save as they once did. Weak savings mean fewer investments in the economy, and that contributes to slower economic growth.
-
Many employers offer 401(k) retirement savings plans as an employee benefit. Many companies match a certain percentage of each employees deposits in the plan.
Study smarter with the SolutionInn App