可知
有一黑色固体A,加入盐酸后生成浅绿色溶液B,同时放出气体C;在浅绿色溶液B中通入Cl2,则转变为黄色溶液D,将D溶液分成两份,一份滴加几滴硫氰化钾溶液呈红色,另一份通入气体C,则棕黄色溶液D重新变成浅绿色溶液B,并析出淡黄色沉淀F;在溶液B中加入烧碱溶液,过一段时间后,可得一种红褐色沉淀E,则: (1)写出各物质的化学式: A______、B______、C______、D______、E______、F______. (2)写出下列化学方程式: ①
有一黑色固体A,加入盐酸后生成浅绿色溶液B,同时放出气体C;在浅绿色溶液B中通入Cl2,则转变为黄色溶液D,将D溶液分成两份,一份滴加几滴硫氰化钾溶液呈红色,另一份通入气体C,则棕黄色溶液D重新变成浅绿色溶液B,并析出淡黄色沉淀F;在溶液B中加入烧碱溶液,过一段时间后,可得一种红褐色沉淀E,则: (1)写出各物质的化学式: A\_\_\_\___、B\_\_\_\___、C\_\_\_\___
在0.1mol/LCH3COONa溶液中,浓度最大的离子是( ).
在0.1mol/LCH3COONa溶液中,浓度最大的离子是( ).
The word “incorporate” in Paragraph 5 is closest in meaning to _____.
The word “incorporate” in Paragraph 5 is closest in meaning to \_\_\_\__.
如图4所示电路,开关s闭合,在滑动触头由a端滑向b端的过程中,下列表述正确的是( ).图4
如图4所示电路,开关s闭合,在滑动触头由a端滑向b端的过程中,下列表述正确的是( ).图4
Why does the author say that even gold and silver were inconvenient if you had to buy something expensive?
Why does the author say that even gold and silver were inconvenient if you had to buy something expensive?
The note was written in _____.
The note was written in \_\_\_\__.