17. Acid and Base Equilibrium

pH of Weak Bases

객관식
Calculate the pH of a solution that is 0.205 M in CH3NH2 and 1.55 M in CH3NH3Br. Assume the Kb for CH3NH2 is 4.4 x 10^-4.
686
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미해결 질문
What is the pH of a 0.750 M solution of NaCN (K_a of HCN is 4.9 × 10^-10)?
971
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객관식
What is the pH of a 0.145 M solution of (CH3)3N (trimethylamine), given that Kb for (CH3)3N is 6.4 × 10^{-5}?
105
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객관식
Calculate the pH of a 0.30 M solution of barium nitrite. Given that the Ka of HNO2 is 4.5 x 10^-4, what is the pH of the solution?
523
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객관식
Determine the pH of a solution that is 0.125 M in CO3^2−. For carbonic acid (H2CO3), Ka1=4.3×10^−7 and Ka2=5.6×10^−11. What is the pH of the solution?
756
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미해결 질문
What is the pH of a solution with a hydroxyl ion (OH^-) concentration of 10^-10 M?
819
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객관식
A 0.050 M solution of hydroxylamine, NH2OH, having Kb = 9.1 × 10^-9 has a pH of ________.
1067
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객관식
What is the pH of a 0.145 M solution of (CH3)3N, given that the Kb of (CH3)3N is 6.4 × 10⁻⁵?
721
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객관식
What is the pH of a 0.05 M sodium fluoride solution, given that F⁻ has a Kb of 1.59 x 10⁻¹¹?
617
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객관식
A student claims that the pH of a $2.65 \times M$ aqueous solution of methylamine, ${CH}_{3} {NH}_{2}$ , is 12.54. Given $K_{b} = 4.4 \times 10^{- 4}$ for ${CH}_{3} {NH}_{2}$ at 25 °C, which pH is most reasonable (assuming $x ≪ 2.65$ )?
39
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미해결 질문
The K_b of methylamine is 4.4 x 10^–4. What is the approximate [OH^–] of a 1 M solution of methylamine?
1024
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객관식
What is the theoretical pH of a 0.1 M solution of sodium acetate (NaC2H3O2), a weak base?
719
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객관식
Calculate the pH of a solution that is 0.205 M in CH3NH2 and 0.155 M in CH3NH3Br. Assume the Kb for CH3NH2 is 4.4 x 10^-4.
604
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객관식
Calculate the pH of a 0.205 M KNO2 solution, given that the Ka of nitrous acid (HNO2) is 4.6 × 10^(-4).
721
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객관식
Calculate the pH of a 0.400 M NaF solution, given that the Ka of HF is 6.4 x 10^-4.
589
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