(1)用量筒取3体积的浓盐酸倒入烧杯中,再取1体积的浓硝酸慢慢倒入浓盐酸中,边加边搅拌
(2)玻璃棒
(3)BD
(4)B;A;2NaCl+H 2SO 4(浓)
Na 2SO 4+2HCl↑或NaCl+H 2SO 4(浓)
NaHSO 4+HCl↑
(5)2Fe(OH) 3
Fe 2O 3+3H 2O;40%或0.40
(1)用量筒取3体积的浓盐酸倒入烧杯中,再取1体积的浓硝酸慢慢倒入浓盐酸中,边加边搅拌
(2)玻璃棒
(3)BD
(4)B;A;2NaCl+H 2SO 4(浓)
Na 2SO 4+2HCl↑或NaCl+H 2SO 4(浓)
NaHSO 4+HCl↑
(5)2Fe(OH) 3
Fe 2O 3+3H 2O;40%或0.40