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The Following Questions Refer to the Following System: 500 ×\times 103
[Mn(C2O4)2]2-
MnC2O4 + C2O42-
K2 =

Question 90

Multiple Choice

The following questions refer to the following system: 500.0 mL of 0.020 M Mn(NO3) 2 are mixed with 1.0 L of 1.0 M Na2C2O4.The oxalate ion,C2O4,acts as a ligand to form a complex ion with the Mn2+ ion with a coordination number of two.
Mn2+ + C2O42-
 The following questions refer to the following system: 500.0 mL of 0.020 M Mn(NO<sub>3</sub>) <sub>2</sub> are mixed with 1.0 L of 1.0 M Na<sub>2</sub>C<sub>2</sub>O<sub>4</sub>.The oxalate ion,C<sub>2</sub>O<sub>4</sub>,acts as a ligand to form a complex ion with the Mn<sup>2+</sup> ion with a coordination number of two. Mn<sup>2+</sup> + C<sub>2</sub>O<sub>4</sub><sup>2</sup><sup>-</sup> <sup> </sup>   MnC<sub>2</sub>O<sub>4</sub> K<sub>1</sub> = 7.9  \times  10<sup>3</sup> [Mn(C<sub>2</sub>O<sub>4</sub>) <sub>2</sub>]<sup>2</sup><sup>-</sup> <sup> </sup>   MnC<sub>2</sub>O<sub>4 </sub>+ C<sub>2</sub>O<sub>4</sub><sup>2</sup><sup>-</sup> K<sub>2</sub> = 1.26  \times  10<sup>-</sup><sup>2</sup> -Find the equilibrium concentration of the Mn<sup>2+</sup> ion. A) 9.2  \times 10<sup>-</sup><sup>5</sup> M B) 0.01 M C) 2.5  \times  10<sup>-</sup><sup>8</sup> M D) 1.3  \times 10<sup>-</sup><sup>4</sup> M E) 6.7  \times  10<sup>-</sup><sup>3</sup> M MnC2O4
K1 = 7.9 ×\times 103
[Mn(C2O4) 2]2-
 The following questions refer to the following system: 500.0 mL of 0.020 M Mn(NO<sub>3</sub>) <sub>2</sub> are mixed with 1.0 L of 1.0 M Na<sub>2</sub>C<sub>2</sub>O<sub>4</sub>.The oxalate ion,C<sub>2</sub>O<sub>4</sub>,acts as a ligand to form a complex ion with the Mn<sup>2+</sup> ion with a coordination number of two. Mn<sup>2+</sup> + C<sub>2</sub>O<sub>4</sub><sup>2</sup><sup>-</sup> <sup> </sup>   MnC<sub>2</sub>O<sub>4</sub> K<sub>1</sub> = 7.9  \times  10<sup>3</sup> [Mn(C<sub>2</sub>O<sub>4</sub>) <sub>2</sub>]<sup>2</sup><sup>-</sup> <sup> </sup>   MnC<sub>2</sub>O<sub>4 </sub>+ C<sub>2</sub>O<sub>4</sub><sup>2</sup><sup>-</sup> K<sub>2</sub> = 1.26  \times  10<sup>-</sup><sup>2</sup> -Find the equilibrium concentration of the Mn<sup>2+</sup> ion. A) 9.2  \times 10<sup>-</sup><sup>5</sup> M B) 0.01 M C) 2.5  \times  10<sup>-</sup><sup>8</sup> M D) 1.3  \times 10<sup>-</sup><sup>4</sup> M E) 6.7  \times  10<sup>-</sup><sup>3</sup> M MnC2O4 + C2O42-
K2 = 1.26 ×\times 10-2
-Find the equilibrium concentration of the Mn2+ ion.


A) 9.2 ×\times 10-5 M
B) 0.01 M
C) 2.5 ×\times 10-8 M
D) 1.3 ×\times 10-4 M
E) 6.7 ×\times 10-3 M

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