多硫化钠Na2Sx(x>2)在结构上与Na2O2、FeS2、CaC2等有相似之处。Na2Sx

多硫化钠Na2Sx(x>2)在结构上与Na2O2、FeS2、CaC2等有相似之处。Na2Sx在碱性溶液中可被NaClO氧化为Na2SO4,而NaClO被还原为NaCl,反应中Na2Sx与NaClO的物质的量之比为1︰16,则x的值是(     )

A  5             B 4              C 3               D 2

 

答案

A

解析:多硫化钠Na2Sx硫的化合价是-2/x价,氧化产物是+6价,则失去的电子是(6+2/x)×x=6x+2。NaClO得到的电子是2,所以根据得失电子守恒可知6x+2=2×16,解得x=5,答案选C。

 

相关题目

根据句意及首字母提示,写出单词,使句子完整、正确。 1. P
根据句意及首字母提示,写出单词,使句子完整、正确。 1. Please keep q_______ in the library. It’s polite. 2. John’s uncle is the m________ of the company. There are five h
手机已经从简单的通话工具演变为个人信息智能终端设备。
手机已经从简单的通话工具演变为个人信息智能终端设备。至2012年底,我国手机用户突破11亿。如今,手机已是更新换代频率最高的电子产品,手机支
如图为真核细胞DNA复制过程的模式图,据图分析,下列相关
如图为真核细胞DNA复制过程的模式图,据图分析,下列相关叙述错误的是( ) A.解旋酶能使双链DNA解开,但需要消耗ATPB.DNA分子复制的方式是半保
Opinion is a word that is used carelessly today. It is used to refer to matters
Opinion is a word that is used carelessly today. It is used to refer to matters of taste, belief, and judgment. This casual use would probably cause   36   confusion if people didn’t attach too
蜡烛燃烧生成二氧化碳和水。下列关于该化学反应的叙述正
蜡烛燃烧生成二氧化碳和水。下列关于该化学反应的叙述正确的是(      )     A.燃烧前后蜡烛的质量没有改变     B.蜡烛减少的质量等于生成的
亚美尼亚商人艾拉希特斯公元156年在埃及的亚历山大城与当
亚美尼亚商人艾拉希特斯公元156年在埃及的亚历山大城与当地的皮匠西努耶发生了经济纠纷,上诉至法庭。法官对他们两人的裁决将根据 A.《十二铜表
She thought I was talking about her daughter, ,in fact,I was talking about
She thought I was talking about her daughter, ,in fact,I was talking about my daughter. A.whom B.where C.which D.while
Being alone in outer space can be frightening. That is one reason why astronauts
Being alone in outer space can be frightening. That is one reason why astronauts on solo(单独的) space flight were given plenty of work to keep them  21   . They were also in constant commun

最新题目