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WorksheetsDynamic Equlibrium 动态平衡
Total questions: 3
Worksheet time: 2mins
Which of the following processes are irreversible? 以下哪些过程是不可逆的？
1. Frying eggs 煎鸡蛋
2. Baking bread 烤面包
3. Burning natural gas 燃烧天然气
1 and 2 only
1 and 3 only
2 and 3 only
1,2, and 3
Which of the following reactions does NOT go to completion under room conditions? 以下哪项反应在室内条件下不会完成？
Combustion of ethanol
乙醇的燃烧
Ionization of carbonic acid in water
水中碳酸的电离
Dissociation of sodium hydroxide in water
氢氧化钠在水中的离解
Neutralization of potassium hydroxide with nitric acid
用硝酸中和氢氧化钾
Consider the following system at equilibrium:
2CrO42- (aq) + 2H+(aq) ⟷ Cr2O7(aq)+H2O(l)
Which of the following statements are INCORRECT? 以下哪些陈述是不正确的？
1. The concentration of Cr2O72-(aq) must be the same as the concentration of CrO42- (aq). Cr2O72-(aq) 的浓度必须与 CrO42-(aq) 的浓度相同。
2. The rates of both the forward reaction and backward reaction are zero. 正向反应和反向反应的速率均为零。
3. This system always has the same pH. 该系统始终具有相同的 pH 值。
1 and 2 only.
1 and 3 only.
2 and 3 only.
1, 2 and 3.
