K_c Is 1

question 17

Multiple Choice

K_c is 1.67 × 10²⁰ at 25 °C for the formation of iron(III) oxalate complex ion:
Fe³⁺(aq) + 3C₂O₄^2-(aq) ⇌ [Fe(C₂O₄) ₃]^3-(aq)
If 0.0200 mol L^-1 Fe³⁺ is initially mixed with 1.00 mol L^-1 oxalate ion,what is the concentration of Fe³⁺ ion at equilibrium?

• A)1.44 × 10^-22 mol L^-1
• B)0.0100 mol L^-1
• C)8.35 × 10¹⁹ mol L^-1
• D)6.94 × 10²¹ mol L^-1

---

Definitions:

Allele

A variant form of a gene that arises due to mutation and can be found at a specific place on a chromosome.

Gene

A basic unit of heredity in a living organism that is made up of DNA and positioned on a chromosome; genes contain the information needed to build and maintain an organism's cells and pass traits to offspring.

Doulas

Professionals trained to provide support and guidance to women before, during, and after childbirth.

Doula

A woman who helps with the birth process. Traditionally in Latin America, a doula was the only professional who attended childbirth. Now doulas are likely to arrive at the woman’s home during early labor and later work alongside a hospital’s staff.