用铅蓄电池电解甲、乙电解池中的溶液。已知铅蓄电池的总反应为:

用铅蓄电池电解甲、乙电解池中的溶液。已知铅蓄电池的总反应为:Pb(s) + PbO2(s) + 2 H2SO4(aq) 2 PbSO4 (s) +2 H2O (l)  电解一段时间后向c极和d极附近分别滴加酚酞试剂,c极附近溶液变红,下列说法正确的是(   )

A.d极为阴极

B.若利用甲池精炼铜,b极应为粗铜

C.放电时铅蓄电池负极的电极反应式为:

PbO2(s) + 4 H(aq)+SO4 2(aq)+4e = PbSO4 (s) +2H2O(l)

D.若四个电极材料均为石墨,当析出6.4 g Cu时,两池中共产生气体3.36 L(标准状况下)

 

答案

B

解析:

 

相关题目

-- _________ you called yesterday?   -- Tom.Why?       A.Who it is tha
-- _________ you called yesterday?   -- Tom.Why?       A.Who it is that   B.Who is it that   C.Who was it that       D.Who it was that
将一铜块放在炉子上加热,在铜块温度升高的过程中,它的
将一铜块放在炉子上加热,在铜块温度升高的过程中,它的内能_______、比热容_______。(以上两空选填“增大”“减小”或“不变”)
常温常压下,下列各组离子在指定溶液中能大量共存的是 A.
常温常压下,下列各组离子在指定溶液中能大量共存的是 A.c(Fe3+)=0.1 mol/L溶液中:Na+、NH、SCN-、SO B.能溶解CaCO3的溶液中:Fe3+、Ca2+、Cl-、NO
某课外兴趣小组为了探究碱性溶液中Mg2+、AlO2-与溶液pH的
某课外兴趣小组为了探究碱性溶液中Mg2+、AlO2-与溶液pH的关系,进行下列实验:向含有0.1 mol HCl、0.1 mol MgCl2、1.0 mol AlCl3的混合溶液中逐渐加入NaOH溶液
His album won several awards at the music festival, _______ was beyond his wilde
His album won several awards at the music festival, _______ was beyond his wildest dream. A. which         B. that           C. where         D. it
 ―Is Paul playing both soccer and tennis for the school? ―He_______. But
 ―Is Paul playing both soccer and tennis for the school? ―He_______. But now he has given up playing tennis. A. is     B. has    C. was       D. had
If you can’t get to sleep, then get up and try to do something ________ lyin
If you can’t get to sleep, then get up and try to do something ________ lying in bed.A. take the place of B. take place C. instead of D. because of
6.题6表是食用碘盐包装上的部分说明,下列说法正确的是 A.
6.题6表是食用碘盐包装上的部分说明,下列说法正确的是 A.高温会导致碘的损失B.碘酸钾可氧化氯化钠C.可用淀粉检验碘盐中的碘酸钾D.该碘盐中碘酸钾

最新题目