您所在的当前位置：高中化学试题 >

与量有关的离子方程式的书写

> 下列反应的方程式中，不正确的是 [ ] A.实验室用不溶于水的FeS和稀H 2SO 4反应制取H 2S：FeS+2H +=Fe 2++H 2S↑ B.SiO 2与氢氧化钠溶液反应：SiO 2+4OH -=SiO 3 2-＋2H 2O C.AlCl 3溶液中滴加过量氨水：Al 3++3NH 3·H 2O=Al(OH) 3↓+3NH 4 + D.Cl 2通入Na 2SO 3溶液中：H 2O+Cl 2+SO 3 2-=SO 4 2-+2Cl -+2H +

问题：

发布时间：2024-09-13

下列反应的方程式中，不正确的是
[ ]
A.实验室用不溶于水的FeS和稀H ₂SO ₄反应制取H ₂S：FeS+2H ⁺=Fe ²⁺+H ₂S↑
B.SiO ₂与氢氧化钠溶液反应：SiO ₂+4OH ^-=SiO ₃ ^2-＋2H ₂O
C.AlCl ₃溶液中滴加过量氨水：Al ³⁺+3NH ₃·H ₂O=Al(OH) ₃↓+3NH ₄ ⁺ D.Cl ₂通入Na ₂SO ₃溶液中：H ₂O+Cl ₂+SO ₃ ^2-=SO ₄ ^2-+2Cl ^-+2H ⁺

参考答案：

提问用户：1d***fM4

可能感兴趣的题目：

1 世界著名的“石油海峡”为 A.土耳其海峡 B.霍尔木兹海峡 C.英吉利海峡 D.直布罗陀海峡
2 如图所示，小灯泡L标有“6V 0.3A”字样，当开关S断开时，小灯泡不发光，电压表的读数为9v．当闭合开关S，小灯泡正常发光，则电源电压与电阻R的值分别为 A.6V　　20Ω B.6V　　10Ω C.9V　　20Ω D.9V　　10Ω
3 The boy talked his mother ________ buying him a home computer. A．of B．over C．to D．into
4 Everybody thinks little of the film．In fact，there is no__ of it being tried out in the film festival． A．sign B．use C．possibility D．doubt
5 20. The teenagers wonder what ______makes Jay a successful pop singer. A．is it B．is it that C．it is D．it is that
6 下列推论正确的是 [ ] A．SiH 4的沸点高于CH 4，可推测PH 3的沸点高于NH 3 B．NH 4 +为正四面体结构，可推测PH 4 +也为正四面体结构 C．CO 2晶体是分子晶体，可推测SiO 2晶体也是分子晶体 D．C 2H 6是碳链为直线型的非极性分子，可推测C 3H 8也是碳链为直线型的非极性分子
7 The Zhangs ________ going to the park now. A.is B.are C.has D.have
8 Below is a selection from a popular science book. If blood is red, why are veins (静脉) blue? Actually, veins are not blue at all. They are more of a clear, yellowish colour. Although blood looks red when it"s outside the body, when it"s sitting in a vein near the surface of the skin, it"s more of a dark reddish purple color. At the right depth, these blood-filled veins reflect less red light than the surrounding skin, making them look blue by comparison. Which works harder, your heart or your brain? Which works harder depends on whether you are busy thinking or busy exercising. Your heart works up to three times harder during exercise, and shifts enough blood over a lifetime to fill a supertanker. But, in the long run, your brain probably tips it, because even when you’re sitting still your brain is using twice as much energy as your heart, and it takes four to five times as much blood to feed it. Why do teeth fall out, and why don"t they grow back in grown-ups? Baby (or "milk") teeth do not last long; they fall out to make room for bigger, stronger adult teeth later on. Adult teeth fall out when they become damaged, decayed and infected by bacteria. Once this second set of teeth has grown in, you"re done. When they"re gone, they’re gone. This is because nature figures you"re set for life, and what controls regrowth of your teeth switches off. Do old people shrink as they age? Yes and no. Many people do get shorter as they age. But, when they do, it isn"t because they"re shrinking all over. They simply lose height as their spine(脊柱) becomes shorter and more curved due to disuse and the effects of gravity. Many (but not all) men and women do lose height as they get older. Men lose an average of 3-4 cm in height as they age, while women may lose 5 cm or more. If you live to be 200 years old, would you keep shrinking till you were, like 60 cm tall, like a little boy again? No, because old people don"t really shrink! It is not that they are growing backwards — their legs, arms and backbones getting shorter. When they do get shorter, it"s because the spine has shortened a little or, more often, become more bent and curved. Why does spinning（旋转） make you dizzy (眩晕的)? Because your brain gets confused between what you"re seeing and what you"re feeling. The brain senses that you’re spinning using special gravity-and-motion-sensing organs in your inner ear, which work together with your eyes to keep your vision and balance stable. But when you suddenly stop spinning the system goes out of control, and your brain thinks you"re moving while you"re not! Where do feelings and emotions come from? Mostly from an ancient part of the brain called the limbic system. All mammals have this brain area — from mice to dogs, cats, and humans. So all mammals feel basic emotions like fear, pain and pleasure. But since human feelings also involve other newer bits of the brain, we feel more complex emotions than any other animal on the planet. If exercise wears you out, how can it be good for you? Because our bodies adapt to everything we do to them. And as far as your body is concerned, it’s "use it, or lose it”! It"s not that exercise makes you healthy; it"s more that a lack of exercise leaves your body weak and easily affected by disease. 小题1:What is the color of blood in a vein near the surface of the skin? A．Blue. B．Light yellow. C．Red. D．Dark reddish purple. 小题2:Why do some old people look a little shrunken as they age? A．Because their spine is in active use. B．Because they are more easily affected by gravity. C．Because they keep growing backwards. D．Because their spine becomes more bent. 小题3:Which of the following statements about our brain is true? A．In the long run, our brain probably works harder than our heart. B．When our brain senses the spinning, we will fell dizzy. C．The brains of the other mammals are as complex as those of humans. D．Our feelings and emotions come from the most developed area in our brain. 小题4:What is the main purpose of the selection? A．To give advice on how to stay healthy. B．To provide information about our body. C．To challenge new findings in medical research. D．To report the latest discoveries in medical science.
9 关于地磁场，下列说法正确的是（　　） A．地球是一个巨大的磁体，地磁N极在地理南极附近，S极在地理北极附近 B．地磁场在地表附近某处，有两个分量，水平分量指向地理北极附近，竖直分量一定竖直向下 C．若能将指南针放在地心，则它的N极指向地球北极 D．若能将指南针放在地心，则它的N极指向地球南极
10 2010年12月6日，国家主席胡锦涛同美国总统奥巴马通电话时就朝鲜半岛局势强调，对话谈判是解决朝鲜半岛核问题及有关问题、实现半岛长治久安的唯一正确途径。要缓和不要紧张，要对话不要对抗，要和平不要战争。这说明我国始终 ①坚持独立自主的和平外交政策 ②坚持维护世界的和平与稳定 ③反对国际政治经济旧秩序 ④维护世界多极化的格局 A．②③ B．①④ C．③④ D．①②