Exam 9: Acids and Bases

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Ammonia and ammonium are both present in water at equilibrium, as shown by the following acid-base equation. What will happen if ammonium is added to a solution of ammonia and ammonium at equilibrium? NH3 + H2O Ammonia and ammonium are both present in water at equilibrium, as shown by the following acid-base equation. What will happen if ammonium is added to a solution of ammonia and ammonium at equilibrium? NH<sub>3</sub> + H<sub>2</sub>O   <sup>+</sup>NH<sub>4</sub> + <font face=symbol><sup></sup></font>OH Ammonia water ammonium hydroxide +NH4 + OH Ammonia water ammonium hydroxide

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Each circle is a sample of an aqueous acidic or basic solution. Which of the solutions contains a strong acid?

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Which of the following statements does NOT describe a pH buffer?

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Where does digestion of proteins begin?

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The buffering system of the blood is shown below. Which of the following equations represents the reaction that occurs when hydroxide is added to this buffer? The buffering system of the blood is shown below. Which of the following equations represents the reaction that occurs when hydroxide is added to this buffer?

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Which of the following statements best describes the behavior of water in the acid-base reaction between dopamine and water? Which of the following statements best describes the behavior of water in the acid-base reaction between dopamine and water?

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Which of the following statements about acids is NOT true?

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The following reaction is a reversible reaction. Which of the following statements best describes what it means for this reaction to be reversible? The following reaction is a reversible reaction. Which of the following statements best describes what it means for this reaction to be reversible?

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Methylamide (CH3CONH2) has a Ka of 1 10-16. What is the pKa of methylamide?

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A sample of gastric juice has a pH of 1.20. What is the concentration of hydroxide in this sample?

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The boxed species in the following reaction is

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When an acid is dissolved in water, it reacts to give _________ and ________.

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What happens to pH when the buffer capacity of a solution is exceeded?

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A blood sample has a pH of 7.42. What is the concentration of hydronium in the sample?

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Gastric juice is the most acidic fluid in the body. Why is gastric juice so acidic?

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What is the concentration of H3O+ and -OH in pure water at room temperature?

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Which of the following statements best describes the purpose of insulin in the body?

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Which of the following statements best describes what it means for the acid-base reaction between acetic acid and water to be in equilibrium? Which of the following statements best describes what it means for the acid-base reaction between acetic acid and water to be in equilibrium?

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Which of the following statements does NOT correctly describe buffer capacity?

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The boxed species in the following reaction is The boxed species in the following reaction is    The boxed species in the following reaction is

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