举一反三
- Regarding the determination of the effective buffer range of the buffer solution, which of the following is not the factor we should consider A: pH= pKa±1 B: The buffer ratio is between 0.1 and 10 C: Large buffer capacity D: High total concentration
- The more the total concentration of a buffer, the more its buffer capacity at 298K.
- The main difference between interstitial fluid and plasma is A: The protein concentration is higher in plasma B: The Na+ concentration is higher in plasma C: The protein concentration is higher in interstitial fluid D: The Na+ concentration is higher in interstitial fluid E: The organic acid concentration is higher in plasma
- G-P(Gummel-Poon)<br/>model is used in uniform doping concentration in the base. (<br/>)
- G-P(Gummel-Poon) model is used in uniform doping concentration in the<br/>base. (<br/>)
内容
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(1) The weak monoprotic acid HA is 2.5% dissociated in 0.10 mol·L-1solution. What is the acidity constant, Ka, of HA?(2)A certain solution of HA has a pH=2.51. What is the concentration of the solution?
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The more the total concentration of a buffer, the more its buffer capacity at 298K. A: 正确 B: 错误
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Measuring a colored solution by using of Beer's law, when the concentration is c, the transmittance is T. If the concentration is changed to c/3 and other conditions remain unchanged, then T is ______ .when the concentration is 2c, T is ______
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A solution whose hydroxide concentration is 10-8 M, the pH of the solution is A: 5 B: 6 C: 7 D: 8
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They are trying to work out a ______ to the problem. A: satisfaction B: solution C: concentration D: attention