皮皮学，免费搜题
登录
搜题
【简答题】
（1）某溶液中可能有下列阴离子：SO 4 2- 、CO 3 2- 、Cl - ．当溶液中存在大量H + 时，溶液中不能大量存在的离子是______；当溶液中存在大量的Ba 2+ 时，溶液中不能大量存在的离子是______． （2）除去括号中杂质，写出所加试剂的化学式与反应的离子方程式 ①SO 4 2- （CO 3 2- ），所加试剂______，离子方程式：______ ②Cl - （SO 4 2- ），所加试剂______，离子方程式：______ （3）氧化还原反应的实质是电子的转移（得失或偏移），氧化反应表现为被氧化的元素化合价______，其实质是该元素的原子失去（或偏离）电子的过程，发生氧化反应的物质称为______剂．根据参与电子转移的元素种类不同的分类方法，下列所提供的反应中电子转移发生在不同价态的同种元素之间的有______（填序号，下同）；电子转移发生在不同元素之间的有______． ①C+CO 2 △ . 2CO ②NH 4 NO 3 △ . N 2 O↑+2H 2 O ③2KClO 3 Mn O 2 . △ 2KCl+3O 2 ↑ ④S+2KNO 3 +3C═K 2 S+N 2 ↑+3CO 2 ↑ ⑤3Cl 2 +6NaOH △ . 5NaCl+NaClO 3 +3H 2 O ⑥HgS+O 2 △ . Hg+SO 2 ．
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
.
..
皮皮学刷刷变学霸
举一反三
【简答题】/i:/ is the sound in we or see /ei/ is the sound in make or day Write the following as words in the box above. 1. One number between 1 and 10 which has the sound /i:/ as a word. 2. One number between ...
查看完整题目与答案
【单选题】如果出差在外,住在宾馆中,并自己携带配置有无线网卡的笔记本电脑,通过 可接入互联网。
A.
LAN
B.
无线WLAN
C.
电话线拨号
D.
手机卡
查看完整题目与答案
【单选题】如果出差在外,住在宾馆中,并自己携带配置有无线网卡的笔记本电脑,通过 可接入互联网。
A.
LAN
B.
无线LAN
C.
电话线拨号
D.
手机卡
查看完整题目与答案
【简答题】Translate the letters into Chinese : D ear Sir, CHINESE TABLECLOTHS We learned from the Commercial Counsellor of our Embassy in Ottawa that you deal in tablecloths. We sell Chinese tablecloths. They a...
查看完整题目与答案
【单选题】It is from the gatehouse __ we get newspapers, magazines and letters.
A.
that
B.
which
C.
in which
D.
where
查看完整题目与答案
【单选题】Neither rain nor snow (keeps) the postman from delivering our letters (which) we (so much) look forward (to receive).
A.
keeps
B.
which
C.
so much
D.
to receive
查看完整题目与答案
【简答题】Make a response to the following letters, applying the writing principle s discussed in this chapter. Dear Sir/Madam: We know your firm from the ad in the magazine. We are interested in your washing m...
查看完整题目与答案
【单选题】输血可传播下列哪一种疾病
A.
结核
B.
伤寒
C.
疟疾
D.
钩虫病
E.
白血病
查看完整题目与答案
【简答题】What do we learn from the woman's words? [A] She has more letters now than before. [B] She doesn't have so many letters as before. [C] She often hears from her family now. [D] She is used to having a ...
查看完整题目与答案
【简答题】按要求改写句子。 1. We got over l, 000 letters, faxes and e-mails from the readers. (改为同义句) We got ______ ______ 1, 000 letters, faxes and e-mails from the readers. 2. Next Saturday he is going swimming. ( 对画...
查看完整题目与答案
相关题目：
【简答题】/i:/ is the sound in we or see /ei/ is the sound in make or day Write the following as words in the box above. 1. One number between 1 and 10 which has the sound /i:/ as a word. 2. One number between ...
查看完整题目与答案
【单选题】如果出差在外,住在宾馆中,并自己携带配置有无线网卡的笔记本电脑,通过 可接入互联网。
A.
LAN
B.
无线WLAN
C.
电话线拨号
D.
手机卡
查看完整题目与答案
【单选题】如果出差在外,住在宾馆中,并自己携带配置有无线网卡的笔记本电脑,通过 可接入互联网。
A.
LAN
B.
无线LAN
C.
电话线拨号
D.
手机卡
查看完整题目与答案
【简答题】Translate the letters into Chinese : D ear Sir, CHINESE TABLECLOTHS We learned from the Commercial Counsellor of our Embassy in Ottawa that you deal in tablecloths. We sell Chinese tablecloths. They a...
查看完整题目与答案
【单选题】It is from the gatehouse __ we get newspapers, magazines and letters.
A.
that
B.
which
C.
in which
D.
where
查看完整题目与答案
【单选题】Neither rain nor snow (keeps) the postman from delivering our letters (which) we (so much) look forward (to receive).
A.
keeps
B.
which
C.
so much
D.
to receive
查看完整题目与答案
【简答题】Make a response to the following letters, applying the writing principle s discussed in this chapter. Dear Sir/Madam: We know your firm from the ad in the magazine. We are interested in your washing m...
查看完整题目与答案
【单选题】输血可传播下列哪一种疾病
A.
结核
B.
伤寒
C.
疟疾
D.
钩虫病
E.
白血病
查看完整题目与答案
【简答题】What do we learn from the woman's words? [A] She has more letters now than before. [B] She doesn't have so many letters as before. [C] She often hears from her family now. [D] She is used to having a ...
查看完整题目与答案
【简答题】按要求改写句子。 1. We got over l, 000 letters, faxes and e-mails from the readers. (改为同义句) We got ______ ______ 1, 000 letters, faxes and e-mails from the readers. 2. Next Saturday he is going swimming. ( 对画...
查看完整题目与答案