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23 Cards in this Set
- Front
- Back
In a solution prepared by dissolving 0.1 mole of propanoic acid in enough water to make 1 L of solution, the Ph is observed to be 2.945. The Ka is
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1.3x10^-5 yes |
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The OH- concentration in a 2.5x10^-5 M Ba(OH)2 solution is
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5x10^-3 M yes |
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Which of the following does not fit the definition of a Bronsted Base?
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NH4+ yes |
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For weak acid, HX, Ka= 7.3x10^-6. Calculate the pH of a 0.59 M solution of Hx
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2.68 yes |
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Which of the following is a conjugate acid/base pair?
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more than one of these no |
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Calculate the pOH of a 4.6 M solution of HCl
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-0.66 no |
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Which of the following substances is never a Bronsted-Lowry acid in aqueous solution?
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sodium acetate, NaCH2CO2(s) yes |
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What is the concentration of H+ in a 2.5 M HCl solution?
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2.5 M yes |
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Which of the following chemical equations corresponds to the base ionization constant, Kb, for hydrogen sulfite ion (HSO-3)?
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HSO3-(aq) + H2O (l) = H2SO3 (aq) + OH- (aq) yes |
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Which one of these salts will form a basic solution on dissolving in water?
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KCN yes |
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Which of the following is the equilibrium constant expression for the dissociation of the weak acid HOCl?
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K = ([H+][OCl-]) / ([HOCl]) yes |
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A 0.14 M HNO2 solution is 5.7% ionized. Calculate the H+ ion concentration
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8x10^-3 M yes |
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Calculate the pH of a 0.75 M HOCl solution (pKa = 7.46)
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3.79 yes |
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If the ionization constant of water, Kw, at 40* C is 2.92x10^-14, then what is the hydronium ion concentration and pH for an acidic solution?
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[H3O+] > 1.71 x 10^-7 M and pH < 6.77 yes |
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The pH of aqueous 0.35 M hypobromous acid, HBrO, is 4.53. What is the Ka of this acid?
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2.5E-9 yes |
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What is the pH of 0.492 M aqueous ethylamine?
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0.308 no |
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Aniline is an industrially important amine used in the making of dyes. Determine the pH of an aniline solution made by dissolving 3.9 g of aniline in enough water to make 100 mL of solution.
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9.13 yes |
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What is the pH of 0.109 M HCl(aq) at 25*C?
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0.963 yes |
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Molecules or ions that can alternately behave as either a Bronsted-Lowry acid or base are called:
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amphiprotic yes |
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Which Bronsted-Lowry acid has the strongest conjugate base?
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HF yes |
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In the following chemical equation indicate the reaction that is Bronsted-Lowry acid: HCN(aq) + H2O(l) = H3O+(aq) + CN(aq) |
HCN yes |
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What is the strongest monoprotic acid of the following set if all acids are at 0.1 M concentration?
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hydrofluoric acid with Ka = 3.5x10^-4 yes |
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