高考英语离子的检验、鉴别及推断测试题及答案

高考英语离子的检验、鉴别及推断测试题及答案一、选择题1.Whichofthefollowingtestsissuitablefordetectingthepresenceofchlorideionsinasolution?A.AddafewdropsofAgNO3solution.B.AddafewdropsofBaCl2solution.C.AddafewdropsofNaOHsolutionD.AddafewdropsofHClsolutionAnswer:A2.Whenbariumchloridesolutionisaddedtoacertainacidifiedsulfatesolution,itproduces______.A.AwhiteprecipitateB.AyellowprecipitateC.NoreactionoccursD.AbrownringeffectAnswer:A3.Metalionsplayanimportantroleinmanyinorganicreactions.Amongthefollowingreactions,whichonecontainsiron(III)ions?A.FeSO4+NaOH→Fe(OH)2+NaSO4B.FeSO4+KCl→FeCl2+K2SO4C.K3[Fe(CN)6]+3H2SO4→6HCN↑+2KHSO4+FeSO4D.FeSO4+K2Cr2O7+H2SO4→K2SO4+Cr2(SO4)3+Fe2(SO4)3+H2OAnswer:D4.Whichofthefollowingcanbeusedtodetectthepresenceofaluminumions?A.NaOHsolutionB.HClsolutionC.NH3·H2OsolutionD.AgNO3solutionAnswer:A二、填空题1.Thesulfateiontestisatestforthepresenceof_______.Answer:sulfateions2.Intheflametest,thelithiumionproducesa__________flame.Answer:crimson3.The_________testisusedtodetectthepresenceofnitrateions.Answer:brownring三、简答题1.Whatistheprincipleofthecopperreductionmethodforthedeterminationofchlorideions?Answer:Theprincipleofthecopperreductionmethodistoaddexcesscopper(II)ionstothetestsolutionandthenreducetheexcesscopper(II)ionstocopper(I)ionswithmetalliccopper,whichoxidizeschlorideionstochlorinegas.2.Whataretheimportantcharacteristicsoftheflamecolorproducedbythesodiumion?Answer:Theflamecolorproducedbythesodiumionisyellow.3.WhatistheprincipleoftheBaSO4precipitationmethodforthedeterminationofsulfateions?Answer:TheprincipleoftheBaSO4precipitationmethodistoaddbariumchloridesolutiontothetestsolutioncontainingsulfateions.Underacidicconditions,bariumionsreactwithsulfateionstoforminsolublebariumsulfate,whichprecipitatesoutandcanbefiltered,washed,anddriedtodeterminetheamountofsulfateionsintheoriginalsolution.四、综合题假设你在实验室拿到了一个没有标签的物品，试描述如何使用所学知识来分别检验、鉴别其中的氯离子、铁离子和铜离子，并写出所需试剂、步骤和结果判定。答案：实验要求：检验物品中可能存在的氯离子、铁离子和铜离子。所需试剂及步骤：1.检验氯离子：将一小部分试物溶于水中，加入少量AgNO3溶液，如果有白色沉淀生成，则说明物质中含有氯离子。2.鉴别铁离子：将一小部分试物溶于水中，加入K2Cr2O7和H2SO4混合液，如果有红棕色沉淀生成，则说明