您所在的当前位置：高中化学试题 >

弱电解质电离平衡

> 已知室温时，0.1mo1/LCH 3COOH在水中有0.1％发生电离，下列叙述正确的是： A．该溶液的pH=5 B．由CH3COOH电离出的c(H+)约为水电离出的c(H+)的106倍 C．CH3COOH的电离平衡常数约为1×10-6 D．升高温度，溶液的pH增大

问题：

发布时间：2024-09-12

已知室温时，0.1mo1/LCH ₃COOH在水中有0.1％发生电离，下列叙述正确的是：

A．该溶液的pH=5

B．由CH₃COOH电离出的c(H⁺)约为水电离出的c(H⁺)的10⁶倍

C．CH₃COOH的电离平衡常数约为1×10^-6

D．升高温度，溶液的pH增大

参考答案：

提问用户：jg***Nbv

可能感兴趣的题目：

1 已知地球半径为R，地球表面重力加速度为g，不考虑地球自转的影响。 ⑴推导第一宇宙速度的表达式； ⑵若卫星绕地球做匀速圆周运动，运行轨道距离地面高度为h，求卫星的运行周期T。
2 能贮存在具有玻璃塞的磨口试剂瓶里的试剂是 A．HF溶液 B．KOH溶液 C．盐酸 D．水玻璃
3 完形填空。 Tolstoy, the great Russian writer, liked to walk about in a railway station near his home. One day when he was walking up and down as 1 , looking at people getting on and off the 2 , he heard a lady 3 after him, "Hey, you old fellow, go and bring back my handbag in the 4 room which I 5 there." Tolstoy 6 there. He 7 the bag up and walked quickly along the platform. At the same time the lady was waiting beside the carriage, looking 8 . When at last the old man gave the bag back to her, she opened it to 9 sure nothing was 10 .""Good, old man." said the woman. "You are just as quick as I can expect. Here you are."She gave a copper coin to him. Tolstoy 11 the coin and put it into his pocket with a smile. But the woman was very 12 when she heard he was Tolstoy, the author of the great novel WAR AND PEACE. She returned to Tolstoy and said,"Oh, excuse me... Oh, how silly I was to 13 you as a porter. Please throw back that coin if you forgive me." "Oh, madam, why? You have done 14 wrong." Tolstoy laughed."The coin is given for my work, so I "ll 15 it. Thank you, madam!" ( )1. A. possible ( )2. A. trains ( )3. A. talking ( )4. A. reading ( )5. A. went ( )6. A. passed ( )7. A. lifted ( )8. A. happy ( )9. A. make ( )10. A. disappeared ( )11. A. showed ( )12. A. angry ( )13. A. think ( )14. A. something ( )15. A. throw B. often B. cars B. speaking B. meeting B. forgot B. jumped B. gave B. back B. do B. missed B. watched B. surprised B. treat B. everything B. give C. usual C. buses C. telling C. waiting C. left C. went C. picked C. well C. t ake C. lost C. accepted C. happy C. find C. anything C. keep D. well D. bikes D. shouting D. dining D. bought D. entered D. brought D. worried D. get D. torn D. picked D. sad D. look D. nothing D. stay
4 若420°角的终边所在直线上有一点（-4，a），则a的值为（　　） A．4 3 B．-4 3 C．±4 3 D． 3
5 下列关于电解质溶液的正确判断是 [ ] A．在pH = 12的溶液中，K +、Cl -、HCO 3 -、Na +可以常量共存 B．在pH＝0的溶液中，Na +、NO 3 -、SO 3 2-、K +可以常量共存 C．由0.1 mol·L -1一元酸HA溶液的pH＝3，可推知NaA溶液存在A -＋H 2O HA＋OH - D．由0.1 mol·L -1一元碱BOH溶液的pH＝10，可推知BOH溶液存在BOH＝B ++OH -
6 Millionaires are often very generous and __a lot of their money to charities to help the poor. A．give in B．give up C．give away D．give off
7 我国农业发展应遵循“因地制宜，适当集中，发挥地区优势”的原则。回答10～11题。小题1:我国制定以上农业政策的科学依据是（） A．农业生产具有地域性特征 B．农业生产具有季节性特征 C．农业生产具有明显的周期性特点 D．国家的政策和市场的需求小题2:下列各地区的农业发展，你认为符合以上原则的是（） A．山东丘陵大力发展茶叶种植 B．珠江三角洲发展橡胶生产 C．南疆发展商品棉基地 D．黄土高原地区发展建成全国性的商品粮基地
8 It was in the university ten years ago, _________ they met in September for the first time, _________ they fell in love with each other. A．that; when B．when; that C．that; where D．where; that
9 My name is ________. A.Sun Huimin B.Sun Hui Min C.Sun huimin D.Sun hui min
10 关于家庭电路，下列说法正确的是 A.可以用铁丝或铜丝代替熔丝 B.火线与零线之间的电压是36 V C.熔丝熔断一定是电路中某处发生了短路 D.有金属外壳的家用电器，金属外壳一定要接地