问题 实验题

(1)向KAl(SO4)2溶液中滴加过量氨水,现象是____________________________,反应的离子方程式______________________________________________,再向其中加入过量NaOH溶液,反应现象是____________________________________________,反应的离子方程式为_______________________________________________。

(2)下列六个图中,横坐标为某溶液中加入某物质的物质的量,纵坐标为生成沉淀的物质的量,请把下表中各反应的相应图象的序号填入表中。

溶液加入的物质答案序号
①饱和石灰水通过量CO2 
②AlCl3溶液通过量NH3 
③MgCl2、AlCl3混合溶逐滴加NaOH溶液至过量 
④AlCl3溶液逐滴加NaOH溶液至过量 
⑤含少量HCl的AlCl3溶液逐滴加NaOH溶液至过量 

答案

(1) (1)生成白色胶状沉淀;Al3+3NH3·H2O===Al(OH)3↓+3NH;白色胶状沉淀溶解,溶液变澄清;Al(OH)3+OH===AlO+2H2O

(2)B;C;A;E;F(各1分)

探究题

       有一种观点认为,全球化是发达国家用来打开发展中国家市场的“敲门砖”是殖民主义的一种形式,因此,发展中国家应该团结起来,抵制全球化。请你就上述观点谈谈你的看法。

                                                                                                                                                              

                                                                                                                                                               

                                                                                                                                                               

                                                                                                                                                               

                                                                                                                                                               

问答题