上一次的ch.5化学习题翻译是x1874负责的.. 他说因为是应太多人的回应才做 不过po上去的时候 我本人已经把习题85%完成 其余的都是不懂计算的题目... 所以对於我来说,有没有翻译已经不重要了~~ 有监於此,为了不再在交作业之前才看到有po这些重要的东西 所以我立刻把题目给翻译过来 好让同学不用看英文看到吐血XDDDD 现在 废话少说 立刻看看ba!!!! ps.若果有翻译不当,错漏百出,或者是任何人为疏忽,小弟甘受指教!! 还有离子的电荷可能我打得不太清楚....如果真的看不懂,那我先orz... (我看到上次的ch.5的习题翻译,心想'x1874早一点po出来,我就不用看英文看到吐血了... 还差点爆肝XDDD.不过还是感谢x1874给我一个赚p币的好点子XD,谢谢!!) 浅蓝色题号代表难题喔~~ <-->代表双箭头(可逆反应) ch.7 exercises ch.7 习题 79. Calculate the pH of each of the following solutions. a. 0.10 M CH3NH3Cl b. 0.050 M NaCN c. 0.20 M Na2CO3 (consider only the reaction (CO3)2- + H2O <--> HCO3- + OH-) d. 0.12 M KNO2 e. 0.40 M NH4Br 79. 计算以下每种溶液的pH值. a. 0.10 M CH3NH3Cl b. 0.050 M NaCN c. 0.20 M Na2CO3 (只考虑反应: (CO3)2- + H2O <--> HCO3- + OH-) d. 0.12 M KNO2 e. 0.40 M NH4Br 80. Is an aqueous solution of NaHSO4 acidic, basic, or neutral? What reaction occurs with water? Calculate the pH of a 0.10 M solution of NaHSO4. If solid Na2CO3 is added to a solution of NaHSO4, what reaction occurs between the (CO3)2- and HSO4- ions? 80. 硫酸氢钠的水溶液是酸性、硷性,还是中性呢?在水中发生什麽反应?计算出浓度为 0.10M的硫酸氢钠溶液的pH值.如果把碳酸钠固体加入上述的硫酸氢钠溶液,碳酸根离子及 硫酸氢根离子之间会发生什麽反应? 94. Hemoglobin (abbreviated Hb) is a protein that is responsible for the transport of oxygen in the blood of mammals. Each hemoglobin molecule contains four iron atoms that are the binding sites for O2 molecules. The oxygen binding is pH-dependent.The relevant equilibrium reaction is as follows: (HbH4)4+(aq) + 4O2(g) <--> Hb(O2)4(aq) + 4H+(aq) Use Lw Chatelier's principle to answer the following. a. What form of hemoglobin, (HbH4)4+ or Hb(O2)4, is favored in the lungs? What form is favored in the cells? b. When a person hyperventilates, the concentration of CO2 in the blood is decreased. How does this result affect the oxygen-binding equilibrium? How does breathing into a paper bag help to counteract this effect? c. When a person has suffered a cardiac arrest, injection of a sodium bicarbonate solution is given. Why is this injection necessary? 94.血红素(简称Hb)是一种在哺乳动物的血液中负责运送氧气的蛋白质.每个血红素分子包 含4个有着黏结氧分子的地方的铁原子.pH值取决於黏结了多少氧分子. 有关平衡反应式如下: (HbH4)4+(aq) + 4O2(g) <--> Hb(O2)4(aq) + 4H+(aq) 用Lw Chatelier原理回答以下问题: a. (HbH4)4+ 及 Hb(O2)4 形式的血红素,哪一种有利存在於肺部?哪一种有利存在於细胞 之中? b. 当一个人用力呼吸的时候,在血液中的CO2浓度会减少.这种结果如何影响氧分子黏结的 平衡?在纸袋中呼吸如何抵消这种影响? c. 当一个人心脏停跳时,必须采取注射重碳酸钠溶液的急救方法.为什麽要采取这样的注 射方法? 98. Acrylic acid (CH2 = CHCO2H) is a precursor for many important plastics. Ka for acrylic acid is 5.6 x 10^-5. a. Calculate the pH of a 0.10 M solution of acrylic acid. b. Calculate the percent dissociation of a 0.10 M solution of acrylic acid. c. Calculate the [H+] necessary to ensure that the percent dissociation of a 0.10 M solution of acrylic acid is less than 0.010%. d. Calculate the pH of a 0.050 M solution of sodium acylate (NaC3H3O2). 98. 丙烯酸(CH2 = CHCO2H)是许多塑胶制品的原材料.丙烯酸的Ka值为5.6 x 10^-5. a. 计算出0.10M丙烯酸溶液的pH值. b. 计算出0.10M丙烯酸溶液的的解离百分比. c. 计算出所需的H+浓度确保0.10M丙烯酸溶液的的解离百分比少於0.010%. d. 计算出0.050M丙烯酸钠溶液的pH值(NaC3H3O2). 101. A solution contains a mixture of acids: 0.50 M HA(Ka = 1.0 x 10^-3), 0.20 M HB(Ka = 1.0 x 10^-10), and 0.10 M HC (Ka = 1.0 x 10^-12). Calculate the [H+] in this solution. 101.有一混合酸溶液,包括:0.50 M HA(Ka = 1.0 x 10^-3), 0.20 M HB(Ka = 1.0 x 10^-10), 以及 0.10 M HC (Ka = 1.0 x 10^-12).计算出溶液的H+浓度. 114. Calculate the pH of a solution initially with 0.10 M NaHSO4 and 0.10 M NH3. 114.计算出含0.10M硫酸氢钠及0.10M氨的溶液的pH值. 118. Calculate the resulting pH when 1.00 L of 1.00 M H2SO4 is added to a tank containing 1.00 x 10^7 L of pure water. 118.当倒入1.00L的1.00M的硫酸在一个装有1.00 x 10^7 L纯水的槽之後,计算出最後所得 的pH值. --

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