A certain metal M forms a soluble nitrate salt M(NO3)3 . Suppose the left half cell of a galvanic cell apparatus is filled with a 2.50M solution of M(NO3)3 and the right half cell with a 12.5mM 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 20.0°C.
Which electrode will be positive? Left of Right
What voltage will the voltmeter show? Assume its positive lead is connected to the positive electrode.
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