final exam MC review file 6

Final exam MC - In every electrolytic and galvanic(voltaic cell the anode is that electrode(A(B(C(D at which oxidation occurs which attracts

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In every electrolytic and galvanic (voltaic) cell the anode is that electrode (A) at which oxidation occurs. (B) which attracts cations. (C) at which electrons are supplied to the solution. (D) at which reduction occurs. The measured reduction potential for Mg 2+ + 2 e Mg (s) is independent of (A) the temperature. (B) the size of the magnesium electrode. (C) the concentration of Mg 2+ . (D) the purity of the magnesium metal used as the electrode. Which statement is true for the cell as it discharges? Zn | Zn 2+ (1 .0 M) || Sn 2+ (1.0 M) | Sn (A) Oxidation occurs at the tin electrode. (B) Electrons will flow from the tin electrode to the zinc electrode. (C) The concentration of Zn 2+ will increase. (D) The mass of the tin electrode will decrease. In the electrolysis of dilute H 2 SO 4 , (A) reduction occurs at the anode. (B) the anode reaction is 2H + + 2 e H 2 (C) the anode reaction is 4OH O 2 + 4H + + 4 e . (D) the anode reaction is 2H 2 O 4H + + O 2 + 4 e .
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During electrolysis (A) positive ions gain electrons at the anode. (B) negative ions lose electrons at the cathode. (C) electrons enter the electrolytic cell at the cathode. (D) ions enter the external or wired circuit and flow from plus to minus. (E) oxidation takes place at the cathode. During the electrolysis of an aqueous solution of K 2 SO 4 the solution around the cathode (A) becomes acidic. (D) becomes more dilute. (B) becomes alkaline. (E) remains unchanged. (C) remains neutral. During the electrolysis of an aqueous solution of CuSO 4 with inert electrodes (A) the anode loses mass and the cathode gains mass. (B) the mass of the anode remains the same but the cathode gains mass. (C) the mass of the anode decreases but the mass of the cathode remains constant. (D) the anode and the cathode neither gain nor lose mass. (E) both electrodes gain in mass. Aqueous solutions of fluorides are difficult to oxidize at the anode of an electrolytic cell because (A) the aqueous solutions of fluorides are nonconducting. (B) it is impossible to find the proper material from which to build the electrodes. (C) the fluorides are not very soluble. (D) in salts the fluoride ion has a plus charge. (E) oxygen is released from water in preference to fluorine.
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Five metals are represented by the symbols L , M , T , R , and Z . When a solution containing all five ions at 1 M concentration is electrolyzed with a small applied voltage, which metal is most likely to be deposited first on the cathode? Unknown Metals Standard Reduction Potentials E 0 L L 2+ + 2 e 0.76 V M M 2+ + 2 e 0.44 V T T 2+ + 2 e 0.13 V R R 3+ + 3 e –0.34 V Z Z + + e –0.80 V (A) L (B) M (C) T (D) R (E) Z The best experimental evidence for the observation that the common ionic charge for calcium is 2+ is that (A) calcium has a low ionization potential. (B)
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This test prep was uploaded on 04/20/2008 for the course CHEM 105 taught by Professor F during the Fall '05 term at Grove City.

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Final exam MC - In every electrolytic and galvanic(voltaic cell the anode is that electrode(A(B(C(D at which oxidation occurs which attracts

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