What Is the PH of a Solution Prepared by Dissolving

question 52

Multiple Choice

What is the pH of a solution prepared by dissolving 4.50 g sodium dihydrogen borate (83.82g/mol) in 650 mL of a 0.0725 M boric acid? The K_a of boric acid is 5.4 *10^-10.Ignore any volume change.

• A)9.21
• B)9.32
• C)9.27
• D)9.40
• E)9.14

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Definitions:

Obsession

Persistent, intrusive, and unwanted thoughts, images, or urges that cause distress or anxiety.

Fires

Rapid, persistent chemical change that releases heat and light and is often accompanied by flame, especially the exothermic oxidation of a combustible substance.

Overwhelming Desire

An intense and consuming longing or craving, often so strong that it becomes difficult to manage or control.

Compulsion

Compulsion is a psychological condition characterized by the irresistible urge to perform specific acts repeatedly, often against the individual’s conscious wishes, as seen in disorders like Obsessive-Compulsive Disorder (OCD).