Ⅰ.配制FeCl2溶液
取部分变质的氯化亚铁固体[含有难溶性杂质Fe(OH)2Cl],向其中加入稀盐酸,使其完全溶解,再加入适量铁粉.
Ⅱ.实验探究Fe3+与Fe2+相互转化
实验1:0.1mol/L FeCl2溶液 滴加KSCN溶液→ 无明显现象 滴加氯水→ 溶液变红
实验2:0.1mol/L FeCl3溶液 滴加KSCN溶液→ 溶液变红 滴加0.1mol/LKI溶液→ 溶液红色未褪去
--- ______, or we'll be late for the meeting.
--- It's only half past one by my watch. We have enough time left.
I need some __________. Can you give me __________?
下列说法中正确的是( )