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Exam 7: Acids and Bases

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Question 31

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Using the above table,fill in the blank with the appropriate integer (1 ,2,3,...)indicating the buffer and/or the letter indicating the formula below. -Buffer ______________________ would be the most effective buffer in basic solutions. A)H₃C₂O₄⁺ B)HC₂O₄^- C)C₃H₄O₃^2- D)HC₃H₅O₃ E)C₂H₃O₂^- F)H₂C₂H₃O₂ G)C₃H₅O₃^-

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Question 32

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Adipic acid has the formula given below. Thus substance would be classified as amphiprotic.

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Question 33

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Which of the following substances can react with both HCl and NaOH?.

Which of the following is most likely to be a salt?

The chemical equation for the reaction of the base, ethoxide, CH₃CH₂O^-, with water would show the products:

When a solution of HF (a weak acid) is added to a solution containing HPO₄^2- (here, a base) , the equation for reaction that occurs is:

Consider the following three buffer reactions. Buffer 1: protein-H⁺ and protein Buffer 2: H₂CO₃ and HCO₃^- Buffer 3: H₂PO₄^- and HPO₄^2- Fill in the blank with the appropriate integer (1,2,or 3)to indicate the buffer system described. -Buffer__________________is found in both plasma and red blood cells.

NaOH and H₂SO₄ are mixed and allowed to react. How many grams of NaOH are required to neutralize 17.25 g of H₂SO₄?

Which of the following is characteristic of a buffer?

A solution composed of HCl and NaCl would produce an effective buffer.

Consider the following reaction. + H₂O HN₃ + OH− This reaction indicates that:

The buffer solution in the flask was prepared using one of the substances shown below. citric acid (pK_a 3.08) NaH₂PO₄ (pK_a 7.21) NH₄Cl (pK_a 9.25) Using the pH meter and solution shown in the image below, complete the following statements using one of the terms below. increase decrease remain constant citric acid NaH₂PO₄ NH₄Cl -If KOH were added to the buffer solution the pH of the solution would __________.

Consider the following reaction. CH₃OH(l) + CH₃OH(l) CH₃O^-(l) + CH₃OH₂⁺(l) This reaction could be classified as both an autoionization reaction and a proton transfer reaction.

Which of the following is true of a buffer prepared with equal concentrations of an acid and its conjugate base?

Which of the following will determine the pH of a buffer made using acetic acid (HC₂H₃O₂) and sodium acetate (NaC₂H₃O₂) ?

In an aqueous solution. the [OH^-] is 2.0 × 10^-3 M. What is the [H₃O⁺] of this solution?

In converting from the pH of a solution to the corresponding H₃O⁺ concentration, the following equation should be used. [H₃O⁺] = 10^-pH

Which of the following is excreted by the kidneys to regulate the effect of excess protein in the diet?

The buffer solution in the flask was prepared using one of the substances shown below. citric acid (pK_a 3.08) NaH₂PO₄ (pK_a 7.21) NH₄Cl (pK_a 9.25) Using the pH meter and solution shown in the image below, complete the following statements using one of the terms below. increase decrease remain constant citric acid NaH₂PO₄ NH₄Cl -The buffer solution in the beaker could be prepared using__________.

Which of the following solutions can function as a buffer?