2018年中考化学真题分类汇编2我们身边的物质考点14酸碱盐和氧化物6化学反应1常见物质的反应和共存(无答案).doc

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2018年中考化学真题分类汇编2我们身边的物质考点14酸碱盐和氧化物6化学反应1常见物质的反应和共存(无答案).doc_第1页
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1、1酸碱盐和氧化物18 (2018 广西省玉林市,题号 18,分值2)小刘对某溶液所含溶质的记录,合理的是A. NaNO3 AlCl3 HCl ZnSO4B. NH4Cl K2SO4 KOH Na2CO3 C. K2CO3 NaCl KNO3 H2SO4D. BaCl2 HCI CaCl2 NH3 H2O【答案】A【解析】A.这四种物质相互之间不发生反应,所以可以共存,记录正确,所以 A 正确;B.氯化铵和氢氧化钾反应,生成氨气、水和氯化钾,所以二者不能共存,记录错误,所以B 错误;C.碳酸钾和硫酸反应生成硫酸钾、水和二氧化碳,所以二者不能共存,记录错误,所以 C错误;D.盐酸和氨水反应生成氯化

2、铵和水,所以二者不能共存,记录错误,所以 D 错误。【知识点】物质的共存;酸碱盐的反应(18 仙桃)27以下四组物质中,能在 pH11 的溶液中大量共存且溶液呈无色的一组是 AHCl NaCl ZnSO 4 BMgCl 2 NaNO3 KOHCNa 2CO3 BaCl2 CuSO4 DKCl NaCl NaNO3(18 黔南)6.下列各种溶质的溶液混合后无明显现象的一组是2A. HCl、Na 2CO3、 K 2SO4 B. KNO3、Ba(OH) 2、 NaClC. KCl、AgNO 3、HNO 3 D. NaOH、FeCl 3、(NH 4)2SO4(18 荆州)10下列各组物质在水溶液中能大量共存且形成无色溶液的是( )ANaCl BaCl 2 Na2CO3 BKNO 3 HCl CaCl2CH 2SO4 FeCl3 NaNO3 DNaOH HNO 3 NH4NO3

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