A Solution Is Prepared by Adding 4

question 69

Multiple Choice

A solution is prepared by adding 4.50 mol of sodium hydroxide to 1.00 L of 1.00 M Co(NO₃) ₂. What is the equilibrium concentration of cobalt ions? K_f = 5.0 × 10⁹ for Co(OH) ₄^2-

• A) 1.1 × 10^-2 M
• B) 1.4 × 10^-5 M
• C) 3.2 × 10^-9 M
• D) 2.0 × 10^-10 M
• E) 4.9 × 10^-13 M

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Definitions:

Mass

Mass is a measure of the amount of matter in an object, usually in kilograms or grams.

Liquids

A state of matter characterized by an indefinite shape that conforms to the shape of its container, but with a definite volume.

Solids

Materials with a fixed shape and volume, characterized by strong intermolecular forces.

Density

A physical property defined as the mass per unit volume of a substance, often used to identify or characterize materials.