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Cell Potential Under Nonstandard Conditions Practice Test
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Q1
A galvanic cell operates using the half-cells $\text{Cd}(s)|\text{Cd}^{2+}(aq)$ and $\text{Ag}^+(aq)|\text{Ag}(s)$. The spontaneous overall reaction under standard conditions is
$$\text{Cd}(s)+2\text{Ag}^+(aq)\rightarrow \text{Cd}^{2+}(aq)+2\text{Ag}(s).$$
Compared with standard conditions, the $\text{Ag}^+$ concentration is increased above $1.0,\text{M}$ while all other species remain at standard conditions. Using qualitative Nernst reasoning (by comparing $Q$ to its standard-condition value), what happens to $E_\text{cell}$ and spontaneity?
A galvanic cell operates using the half-cells $\text{Cd}(s)|\text{Cd}^{2+}(aq)$ and $\text{Ag}^+(aq)|\text{Ag}(s)$. The spontaneous overall reaction under standard conditions is $$\text{Cd}(s)+2\text{Ag}^+(aq)\rightarrow \text{Cd}^{2+}(aq)+2\text{Ag}(s).$$ Compared with standard conditions, the $\text{Ag}^+$ concentration is increased above $1.0,\text{M}$ while all other species remain at standard conditions. Using qualitative Nernst reasoning (by comparing $Q$ to its standard-condition value), what happens to $E_\text{cell}$ and spontaneity?