K_c Is 1

question 14

Multiple Choice

K_c is 1.67 × 10²⁰ at 25°C for the formation of iron(III) oxalate complex ion:
Fe³⁺(aq) + 3 C₂O₄^2-(aq) ⇌ [Fe(C₂O₄) ₃]^3-(aq) .
If 0.0200 M Fe³⁺ is initially mixed with 1.00 M oxalate ion,what is the concentration of Fe³⁺ ion at equilibrium?

• A)1.44 × 10^-22 M
• B)0.0100 M
• C)8.35 × 10¹⁹ M
• D)6.94 × 10²¹ M

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Definitions:

Geometric Average Return

The average rate of return on an investment that is calculated by multiplying n variables and then taking the n-th root of the product.

Arithmetic Average Return

The simple mean of a set of returns, calculated by summing the returns over a period and dividing by the number of periods.

Nominal Return

The amount of money gained or lost on an investment, without adjusting for inflation, as opposed to the real return which is adjusted for inflation.

Real Rate

The interest rate adjusted for inflation, representing the true cost of borrowing or the true return on investment.