MA104 ROW 1 Chapter 48test

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

1. IOn selective electrode utilizing pCO2 is used fro the measurement of the electrolyte    a. Phoisphate  b. bicarbonate  c. Magnesium  d. chloride  e. sodium    2.  The confirmatory method for the measurement of Calcium and Magnesium  A. Turbidimetry  b. FES  c. none  d. colorimtery  e. AAS    3. the electrolyte is found as component of phospholipids, nucleic acids, creative phosphate and ATP a. magnesium  b. calcium  c. phosphate  d. bicarbonate  e. chloride

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

One electrochemical technique involves first depositing an analyte on the surface of an electrode, then using an applied current to remove the analyte via a reduction or oxidation reaction. What is this method called? A. Cyclic voltammetry B. Polarography C. Amperometry D. Hydrodynamic voltammetry E. Stripping voltammetry

22.a. Which of the following statements describes the change of specific gravity during battery charging?A. The specific gravity increases faster than the state of charge.B. The specific gravity lags behind the state of charge.C. The change in specific gravity with time is directly proportional to the amount of charge.D. A hydrometer reading shows the true state of charge when taken shortly after charging has begun.22.b. The purpose of the vent on the top of a lead-acid cell is toA. permit the gas to escape during charging.B. add water to the cells.C. trap the hydrogen gas generated during charging.D. remove the sediment developed during charging.

3. How long will it take to electrodeposit 1.05 g Cr from 0.504 M Cr2O72- solution if 3.10 A current ispassed through the solution?A. 15082 s B. 1257 s C. 7541 s D. 2338 s E. 3770 s

Make an inference about the effect of applied current and electrolysis time on the mass of deposited copper. Thoroughly explain and relate any observed trend to Faraday’s Law of Electrolysis.a. What happened to the mass of deposited Cu when the applied current is increased, as shown in Setups 1 and 2? b. What happened to the mass of deposited Cu when the electrolysis time is increased, as shown in Setups 2 and 3?

3. Match the term on the left with the most appropriate description on the right. galvanic cell electrolytic cell impressed current galvanizing series connection standard hydrogen half-cell cell potential Electrolysis A. Assigned a reduction potential of 0 V B. A cell designed with a reversible redox reaction C. A system that uses electricity to make a non-spontaneous reaction occur D. An electrochemical cell that produces electricity E. A form of cathodic protection F. The difference in the reduction potentials of 2 half cells G. Corrosion protection involving zinc H. Joined in a continuous row

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

For indicator electrodes, which statements are true?I         Indicator electrodes are made from relatively inert metals.II        Indicator electrodes work best when the electrode surface is large and clean.III       Platinum is a common indicator electrode.IV       Platinum electrodes are more inert than gold electrodes. A. I, III, and IV B. I, II, and III C. I, II, III, and IV D. II and III E. I, II, and IV

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.

How long would it take to reduce 1 mole of each of the following ions using the current indicated? Assume the voltage issufficient to perform the reduction.a. Al , 1.234 Ab. Ca , 22.2 Ac. Cr , 37.45 Ad. Au , 3.57 A

Pls help ASAP

In one period the price of the cell E° will decrease, due to the increase in energy... A. Sublimation B. Dissolving C. Dissociation D. lonization

Which of the following metals CANNOT be used as a hydrogenation catalyst? Select one: a. Ni b. Pt c. Pd d. Pa

If a pH electrode is experiencing the sodium (alkaline) error... A. the apparent pH will be lower than the true pH. B. the apparent pH will be higher than the true pH C. there will be no effect on the pH, but the glass membrane will dry out because of the sodium. ●

The potential of a silver electrode correlates reproducibly with the concentration of chloride ions in a solution saturated with silver chloride. This is an example of what type of metallic electrode? a. first kind b. second kind c. third kind d. inert e. membrane

Pls help ASAP on both.