EXPERIMENT #6 DETERMINATION OF THE CONCENTRATION OF TARTARIC ACID IN WINE

1. Why must the sodium hydroxide concentration be reported to four significant figures? Why not use only two significant figures?

2. In the procedure, you added approximately 15 mL of water to each Erlenmeyer flask. Why did the exact volume of water not matter? What impact would accidentally adding 17 mL of water have on the results? Be prepared to explain.

3. Explain the significance of the value for relative standard deviation in the context of this experiment.

4. Explain the significance of the value for percent error in the context of this experiment.

5. The stoichiometric ratio in this experiment is 1:2. Determine how the calculation set-ups would change for the reaction between:

HNO3 (aq) + NaOH (aq) = H2O (l) + NaNO3 (aq) OR

H3C5H5O6 (aq) + 3 NaOH (aq) = 3 H2O (l) + Na3C5H5O6 (aq)

Facebook has long conducted digital experiments on various aspects of its website. For example, just before the 2012 election, the company conducted an experiment on the News Feeds of nearly 2 million users so that they would see more “hard news” shared by their friends. In the experiment, news articles that Facebook users' friends had posted appeared higher in their Newsfeeds. Facebook claimed that the news stories being shared were general in nature and not political. The stories originated from a list of 100 top media outlets from the New York Times to Fox News. Industry analysts claim that the change may have boosted voter turnout by as much as 3 percent. Read Chater 3, Closing Case found on page 83.  

Questions

1. Discuss the ethicality and legality of Facebook's experiment with human emotions.
2. Was Facebook's response to criticism concerning that experiment adequate? Why or why not?
3. Consider the experiments that Facebook conducted in May and June 2015. Is there a difference between these two experiments and Facebook's experiment with human emotions? Why or why not?
4. Should the law require companies to inform their users every time they conduct experiments? Why or why not?

Learner Outcomes
BI280-04 Compare and contrast the growth and reproduction of microorganisms.
BI280-04.02 Compare the phases of microbial growth and describe the relation to generation time.
Lab Extension
At 82% progress is this lab simulation you are asked to create your own experiment.

What observation or questions are you investigating with this experiment?

Write down your hypothesis.

Describe the experimental design .

Define the term control group. Which tube is the control?

Define the term experimental/treatment group. Which tube is the experimental/treatment group?

Define independent variable. In this experiment what is the independent variable?

Define dependent variable. In this experiment what is the dependent variable?

. Describe the data collected from the experiment. Include the temperatures you tested and how the growth curves differed. Describe differences (if any) in the lag phase, exponential phase, stationary phase, and death phase. At this point do NOTinterpret the results.

Was your hypothesis supported or rejected?

Interpret the results to draw a conclusion. Think about WHY you had the results you did and HOWthis relates to temperature as a limiting factor in bacterial growth.

Hoover Company signs a four month promissory note for $ 270,000 on January​ 31, 2016. The company is required to pay $ 67, 500 on the note each month. The first payment is on February​ 1, 2016, and the final payment is on May​ 1, 2016. How will this note be reported on the balance sheet at January​ 31, 2016?

On January 1, 2016, the following information was drawn from the accounting records of Carter Company: cash of $350; land of $2,250; notes payable of $650; and common stock of $1,300.

Income statement dated December 31, 2016.

Revenue $620

Expenses -$360

Net Income $260

a. Prepare a statement of changes in stockholders’ equity dated December 31, 2016.

b. Prepare a balance sheet dated December 31, 2016.

c. Prepare a statement of cash flows dated December 31, 2016. (Amounts to be deducted should be indicated with a minus sign.)

d. What is the balance in the Revenue account on January 1, 2016?

V=[(a b), a,b E R+] with (a1 b1)+(a2 b2)=(a1a2 b1b2)and for c E R, c(a b)=(a^c b^c) is a vector space over R. Define T:R^2 to V by T[a b]= (e^a e^b). prove T is a linear transformation from R2 to V.

For the voltaic cell, Cr(s) │ Cr3+ (aq, 0.24 M) ││ Fe2+ (aq, (?) M) │ Fe(s) , Ecell is 0.33 V. Calculate the concentration of Fe2+ (M). Reduction potential for Cr3+(aq)/Cr(s) is -0.74 V, Fe2+(aq)/Fe(s) is -0.44 V. Enter number to 2 decimal places.

Watch the videos on gender and children's programming. Discuss how a television show, movie, video game, or advertising portrays the sexes in a stereotypical way. Be sure to use specific examples to illustrate your position.

http://www.youtube.com/watch?v=5oyGGwjPbLw

http://www.youtube.com/watch?v=8CWMCt35oFY

http://www.youtube.com/watch?v=Nx8RRIiP53Q

February 12 is the end of the first pay period for Prevosti Farms and Sugarhouse and includes work completed during the week of February 8–12. Compute the employee gross pay using 35 hours as the standard workweek for all employees except Mary Shangraw, who works 20 hours per week and receives overtime for any time worked past that point. The other hourly employees receive overtime pay when they work more than 35 hours in one week. Joel Schwartz has made $5,000 in case sales at a 3% commission rate during this pay period. Remember that the employees are paid biweekly. The first day of work for Prevosti Farms and Sugarhouse for all employees is February 8, 2016. Note that the first pay period comprises only one week of work, but the pay frequency for federal income tax purposes is biweekly.

The hours for the nonexempt employees are as follows:

Complete the payroll register for the period's pay. Pay will be disbursed on February 15, 2016 starting with check number 6628. Ensure to input an hourly rate for each employee (including those that are salaried) that is rounded to 5 decimal places.