X x any action that makes q 10 any action that makes

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[x] [x] Any action that makes Q < 1.0. [_] [_] Any action that makes [Zn 2+ ] larger than [Pb 2+ ]. [x] [x] Any action that makes log Q negative. [x] [x] Adding some concentrated Pb(C 2 H 3 O 2 ) 2 solution to the Pb 2+ /Pb couple. [_] [_] Any action that makes Q > 1.0. [_] [_] Any action that makes log Q positive. [_] [_] Adding some concentrated Zn(C 2 H 3 O 2 ) 2 solution to the Zn 2+ /Zn couple. 3. 4/4 points Last Response | Show Details All Responses Notes If you measured a shift in the copper / ascorbic acid cell potential when the pH was changed, what was the origin of the shift? In other words, which half-cell potential was actually changing, the copper potential, the ascorbic acid potential, or both? Select all true statments. [_] [_] The pH change caused a difference in the rate of electron transfer which shifted the potential of the Cu 2+ /Cu half-cell. [x] [x] The Cu 2+ /Cu half-cell did not have a role in the potential change. [x] [x] The ascorbic acid half-reaction contains two H 1+ ions.
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[x] [x] When pH changes, the value of Q changes. [_] [_] Both half-cells experienced potential shifts when the ph was changed. [x] [x] The reaction quotient contains a term for [H 1+ ]. [x] [x] The potential change was due to the pH change in the ascorbic acid half-cell. 4. 3.5/3.5 points Last Response | Show Details All Responses Notes Consider, again, the copper / ascorbic acid cell. a. What potential, in volts, did you measure for the cell at pH 5? .214 [0.214] V b. What is the potential, in volts, of the ascorbic acid half cell at pH 5 vs. the standard hydrogen half cell? Hint: Think about which was the reference (anode). .126 [0.126] V
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