Part B Why is the weak acid needed? Check all that apply. The weak acid is needed because it forms an acid-base conjugate pair. increases the $[H_3O^+]$ in solution. forms $C_2H_3O_2^-$ in solution. Submit Request Answer
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A weak acid partially dissociates in water, establishing an equilibrium between the acid and its conjugate base. Show more…
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Why does a solution of a weak base and its conjugate acid act as a better buffer than does a solution of the weak base alone? Choose one: The presence of both the base and the acid increases the ionic strength of the solution and limits the pH changes. The presence of both the base and the acid provides a significant concentration of both an acid and a base making it harder to change the pH. A solution of a weak base alone has a pH that is too high to be of general use. A solution of weak base alone has no acid present to absorb added base.
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9. A buffer solution is an aqueous solution which consists of a mixture of a weak acid and its conjugate base or a weak base and its conjugate acid. The function of chemical buffers in the blood is to: A. Keep the blood pressure constant B. Act as catalysts to increase the rate of reaction C. Decrease the activation energy D. Maintain a constant pH when a small amount of acid or base is added 10. Ascorbic acid is a weak acid with antioxidant properties. When pure, it is a white to light-yellow crystalline powder. Ascorbic acid is commonly known as vitamin C. Which of the following pairs are the conjugate acid base pairs of the reaction of ascorbic acid with water? A. H2C6H6O6(aq)/H3O+(aq) and H2O(l)/ HC6H6O6-(aq) B. H2C6H6O6(aq)/H2O(l) and H3O+(aq)/ HC6H6O6-(aq) C. H2C6H6O6(aq)/ HC6H6O6-(aq) and H2O(l) /H3O+(aq) D. HC6H6O6-(aq)/H3O+(aq) and H2C6H6O6(aq)/H2O(l)
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