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在硫酸溶液中NaClO3和Na2SO3按2：1的物质的量之比完全反应，生成一种棕黄色气体X． 则X为（ ）
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用二氧化氯ClO2可制备用途广泛的亚氯酸钠NaClO2实验室可用下列装置略去部分夹持仪器制备少量的亚
Na2Sx在碱性溶液中可被NaClO氧化成Na2SO4而NaClO被还原成NaCl反应中Na2Sx与
5
4
3
2
Na2Sx在碱性溶液中可被NaClO氧化为Na2SO4而NaClO被还原为NaCl若反应中Na2Sx
2
3
4
5
将一定量的氯气通入300mL浓度为lmol/L的NaOH溶液中恰好完全反应加热少许时间后溶液中形成N
n（Na
+
）：n（C.1
-
）可能为7：3
n（NaCl）：n（NaClO）：n（NaClO3）可能为11：1：2
参加反应氯气物质的量为0.15mol
反应中转移电子物质的量n的范围：0.15mol＜n＜0.25mol
在硫酸溶液中NaClO3和Na2SO3按物质的量之比2∶1完全反应生成棕黄色气体X则X为
Cl
2
Cl
2
O
ClO
2
Cl
2
O
3
根据世界环保联盟的要求广谱消毒剂ClO2将逐渐取代Cl2成为生产自来水的消毒剂工业上ClO2常用Na
Na2SO4
SO2
S
Na2S
根据世界环保联盟的要求ClO2将逐渐取代Cl2成为生产自来水的消毒剂工业上ClO2常用NaClO3和
1︰1
2︰1
1︰2
2︰3
84消毒液与硫酸溶液反应可以制取氯气NaClO＋NaCl＋H2SO4===Na2SO4＋Cl2↑＋H
下列物质既是钠盐又是硫酸正盐的是
NaHSO4
Na2SO4
Na2SO3
Na2S2O3
Na2Sx在碱性溶液中可被NaClO氧化为Na2SO4而NaClO被还原为NaCl若反应中Na2Sx
2
3
4
5
为检验Na2SO3溶液中含有Na2SO4应选用的试剂是
BaCl2溶液
BaCl2溶液、稀盐酸
BaCl2溶液、稀硝酸
BaCl2溶液、稀硫酸
用二氧化氯ClO2可制备用途广泛的亚氯酸钠NaClO2实验室可用下列装置略去部分夹持仪器制备少量的亚
在硫酸溶液中NaClO3和Na2SO3能按物质的量之比1:2完全反应生成一种棕黄色气体X.同时Na2
Cl
2
Cl
2
O
7
ClO
2
Cl
2
O
ClO2是一种广谱型的消毒剂根据世界环保联盟的要求ClO2将逐渐取代Cl2成为生产自来水的消毒剂工业
1∶1
2∶1
1∶2
2∶3
在硫酸溶液中NaClO3和Na2SO3按物质的量之比2∶1完全反应生成棕黄色气体X.则X.为
Cl
2
Cl
2
O
ClO
2
Cl
2
O
5
已知亚硫酸钠在空气中能被氧气氧化生成硫酸盐Ⅰ.甲同学设计两种方案来检验Na2SO3溶液是否发生变质方
将NaClO3和Na2SO3按物质的量比21加入烧瓶中再滴入少量H2SO4溶液并用水溶解加热产生棕黄
ClO
2
Cl
2
O
Cl
2
Cl
2
O
3
Na2Sx在碱性溶液中可被NaClO氧化为Na2SO4而NaClO被还原为NaCl若反应中Na2Sx
5
4
3
2
除去SO2中混有的HC1气体可选用的试剂是
石灰水
浓硫酸
饱和NaHSO3溶液
饱和Na2SO3溶液
Na2Sx在碱性溶液中可被NaClO氧化为Na2SO4而NaClO被还原为NaCl若反应中Na2Sx
2
3
4
5
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不等式﹣2x2+3x+14≥0的解集为
等比数列{an}的前n项和为Sn若S10＝10S30＝30则S20＝
在正项等比数列{an}中a2a7＝4则log2a1+log2a2+…+log2a8＝
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在等差数列{an}a2＝﹣3a7＝12则公差d＝．
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