I went to see a film with my friend Kitty y .The name of the film was S .It was a a pretty p ,her stepmother(继母)and a handsome prince.We bought the t from the Internet.The film was very i .
X溶液
现象
A
紫色石蕊溶液
溶液先变红后褪色
B
淀粉KI酸性溶液
溶液变为蓝色
C
滴有KSCN的FeSO4溶液
溶液变为红色
D
稀HNO3酸化的AgNO3溶液
有白色沉淀生成