If an Aqueous Solution Is Prepared by Dissolving 1

question 106

Multiple Choice

If an aqueous solution is prepared by dissolving 1.6 mol Na₂CrO₄ in 1.0 L of a buffer at pH 8.24,what will be [Cr₂O₇^2-] in the solution? The resultant equilibria are:
HCrO₄^-(aq) ⇌ H⁺(aq) + CrO₄^2-(aq) K_a = 3.2 × 10^-7
2 HCrO₄^-(aq) ⇌ Cr₂O₇^2-(aq) + H₂O(l) K = 33

• A)9.9 × 10^-5 M
• B)2.9 × 10^-28 M
• C)8.9 × 10^-9 M
• D)8.6 × 10² M
• E)2.8 × 10^-2 M

Recognize how family history studies are designed and the types of samples involved.

Understand the importance of control over variables in laboratory research.

Distinguish between efficacy and effectiveness in therapy outcome research.

Appreciate the breadth of meta-analysis and its role in psychological research.

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Definitions:

Overwhelming Fear

An intense and uncontrollable fear that often leads to panic and may inhibit normal behavior or activity.

Situations

Various events, conditions, or states of affairs in which individuals find themselves.

Group Loyalties

A sense of attachment, dedication, or allegiance individuals feel toward particular groups, cultural identities, or social organizations.

Aquatic Foragers

People or communities that subsist primarily by harvesting resources from aquatic environments, such as fishing, gathering shellfish, or hunting marine animals.