Calculate E_cell for an Electrochemical Cell Based on the Two $\to$

question 155

Multiple Choice

Calculate E_cell for an electrochemical cell based on the two half-reactions given below when the reaction occurs in an acidic aqueous solution in which the pH is buffered at 4.00 and [MnO₄^-] = 1.80 M and [Fe²⁺] = 0.0220 M.Use the smallest whole-number coefficients possible when balancing the overall reaction. MnO₄^- + 4 H⁺ + 3e^- $\to$ MnO₂ + 2 H₂O $\quad$ +1.673 V
Fe²⁺ + 2 e^- $\to$ Fe $\quad$ $\quad$ $\quad$ $\quad$ $\quad$ $\quad$ -0.447 V

• A)+2.10 V
• B)+0.964 V
• C)+1.21 V
• D)+1.86 V
• E)+2.38 V

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Definitions:

Demand SHIFT

A change in the market demand curve, where at every price level, the quantity demanded of a good increases or decreases due to factors other than its price such as consumer preferences, income, or the price of other goods.

Complement

A good whose demand increases when the price of another good decreases. Examples include a parking lot and shopping mall or a hamburger and a hamburger bun.

Demand Curve

A graphical representation showing the relationship between the price of a good and the quantity demanded by consumers at various price levels.

Normal Good

A type of good for which demand increases as the income of the consumer increases, reflecting a direct relationship between income and demand.