Understanding concentration cells A certain metal M forms a soluble nitrate salt M(NO3)2. Suppose the left half cell of a galvanic cell apparatus is filled with a 2.50 mM solution of M(NO3)2 and the right half cell with a 5.00 M solution of the same substance. Electrodes made of M are dipped into both solutions and a voltmeter is connected between them. The temperature of the apparatus is held constant at 25.0 °C. Which electrode will be positive? What voltage will the voltmeter show? Assume its positive lead is connected to the positive electrode. Be sure your answer has a unit symbol, if necessary, and round it to 2 significant digits. left ☐ x10 ○ right ☐ ☑ 5

Chemistry: The Molecular Science
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Chapter17: Electrochemistry And Its Applications
Section17.3: Voltaic Cells
Problem 17.3PSP
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Understanding concentration cells
A certain metal M forms a soluble nitrate salt M(NO3)2. Suppose the left half cell of a galvanic cell apparatus is filled with a 2.50 mM solution of M(NO3)2
and the right half cell with a 5.00 M solution of the same substance. Electrodes made of M are dipped into both solutions and a voltmeter is connected between
them. The temperature of the apparatus is held constant at 25.0 °C.
Which electrode will be positive?
What voltage will the voltmeter show? Assume its positive lead is connected to the
positive electrode.
Be sure your answer has a unit symbol, if necessary, and round it to 2 significant
digits.
left
☐ x10
○ right
☐
☑
5
Transcribed Image Text:Understanding concentration cells A certain metal M forms a soluble nitrate salt M(NO3)2. Suppose the left half cell of a galvanic cell apparatus is filled with a 2.50 mM solution of M(NO3)2 and the right half cell with a 5.00 M solution of the same substance. Electrodes made of M are dipped into both solutions and a voltmeter is connected between them. The temperature of the apparatus is held constant at 25.0 °C. Which electrode will be positive? What voltage will the voltmeter show? Assume its positive lead is connected to the positive electrode. Be sure your answer has a unit symbol, if necessary, and round it to 2 significant digits. left ☐ x10 ○ right ☐ ☑ 5
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