Exam 16: Acids and Bases

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Farmers who raise cotton once used arsenic acid,H3AsO4,as a defoliant at harvest time.Arsenic acid is a polyprotic acid with Ka1 = 2.5 × 10-4,Ka2 = 5.6 × 10-8,and Ka3 = 3 × 10-13.What is the pH of a 0.500 M solution of arsenic acid?

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After a substance acting as a strong base reacts,what remains of the base?

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Which one of the following is a strong base?

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Hydroxylamine,HONH2,readily forms salts such as hydroxylamine hydrochloride which are used as antioxidants in soaps.Hydroxylamine has Kb = 9.1 × 10-9.What is the pH of a 0.025 M HONH2 solution?

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What is the pOH of a 0.025 M HI solution?

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What is the name of a proton donor in an acid-base reaction?

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What is the conjugate acid of NH3?

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Which is a Lewis base?

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What is the concentration of OH- in a 1.0 × 10-3 M Ba(OH)2 solution?

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For H3PO4,Ka1 = 7.3 × 10-3,Ka2 = 6.2 × 10-6,and Ka3 = 4.8 × 10-13.A 0.10 M aqueous solution of Na3PO4 therefore would be _____.

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HCN is classified as a weak acid in water.What does this classification mean?

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What is the H+ ion concentration in a 2.1 × 10-4 M Ca(OH)2 solution?

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The substance NH3 is considered to be

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