MBA6320_HW1_Edwards

Which of the following is true  about pH probe? a. A pH probe consists of a metallic indicator. b. A pH probe will always have an SCE reference electrode. c. A pH probe is specific for measuring proton concentrations. d. A pH probe is an ion selective electrode that consists of a concentration cell.

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Calcium in a 100.0 mL sample of fuit juice was analyzed by an electrochemical method that gave a detector current of 2.40 mA. A standard addition of 10.00 mL of 80.0mg/mL calcium ion increased the current to 4.56 mA. Find the concentration of calcium in the fruit juice.

Táke off any gridlines and add a title and axes labels. Add the trendline and the relevant equation. b) If a sample was analyzed and the current was measured to be 5.18 mA, what is the concentration of analyte in the sample? 5.18= 3.403x + 1.9232 3.2368=3.4403 x 0.947: x Pentane (C5H12) is a liquid with density of 0.929 g/mL at 25 °C. Find the true mass of pentane when the mass in air is 14.82 g. Assume air density is 0.0012 g/mL.

please help with the question

Ascorbic acid (vitamin C) in a 50.0-mL sample of orange juice was analyzed by an electrochemical method that gave a detector current of 1.78 mA. A standard addition of 0.400 mL of 0.279 M ascorbic acid increased the current to 3.35 mA. Find the concentration of ascorbic acid in the orange juice.

Match each commercial application of electrochemistry with the appropriate description.   a.     electroplating b.     secondary cell c.     cathodic protection d.     electrorefining e.     fuel cell f.      Hall-Heroult process g.     dry alkaline battery     ____ 1. measures taken to prevent corrosion     ____ 2. a battery where the reactants are continuously replenished     ____ 3. a primary cell       ____ 4. the application of a thin coating of a metal that resists corrosion     ____ 5. the use of molten cryolite to produce aluminum     ____ 6. a rechargeable battery     ____ 7. the process used to obtain high-grade, pure metals from impure materials

Which of the following is an electrode of the second kind? a. A copper electrode in a saturated copper iodide solution b. Hydrogen gas in an H2SO4 solution with a platinum electrode c. Sodium chloride in contact with metallic sodium d. A solution of FeCl3 and FeSO4 with a platinum electrode

DOL The Chemistry of Rusting-An Introduction to Unit 4: Chemical T Flaking Away - Check Your Understanding For each question, answer on your own in the first row of the table. During partner time, share your responses and revise your answers as needed, recording them in the second row. Be prepared to share during the whole-class discussion. Record final your answer to each question in the last row of the table. 1. Write a short paragraph that connects the following words: oxidation, reduction, anode, cathode, and electrons. My first answer, thinking on my own: My revised answer after discussing it with my partner: My final answer after the whole-class discussion: НА

How does hydronium ion concentation relate to electrode potential in potentiometry? a. As temperature increases, the pH also increases. b. Each pH unit represents a 59.1 mV change in potential. c. The increase in pH is linear relationship to the electrode potential. d. Decreased H+ concentration is directly proportional to electrode potential. e. none of these

Please help me answer #2. Answer written on bracket. Thank you.

Solve 1 and 2 please

A concentration cell is set up with two nickel electrodes and two solutions of Ni(NO3)2. One cell contains a solution that is 0.810 M and we connect that electrode to the positive terminal of a voltmeter. The other solution is 0.000245 M and is connected to the negative terminal. The measured voltage on the voltmeter is positive. At 298 K, what is that measured positive potential? (Report your result in volts with 3 decimal places. Do not include units in your answer.) Your Answer: Your Answer

Voltmeter Zn Salt bridge zn+ a. What is the value of E? b. What is the value of Ecell when [Zn2+] = 0.010 M and [|Cr3+] = 1.0 M? c. Based on the value of Ecell, what direction (left or right) are electrons flowing through the circuit? (If you don't know how to answer part b, how would you determine the direction?)

Using the information from the table below, calculate the Nernst Potential for Na+, K+, Ca+2, Cl-. Assume that the cells are at 37C.

The Mohr's salt sample is diluted using a 0.5 M H,So,/ H;PO, solution. The function of the sulfuric acid is: Seleccione una. provide the protons for the reaction oxidize the ferrous ion reduce the chromic ion make the final point region more drastic change color when reaching the titration end point