
( 1.5 điểm)
Fe
FeSO4
Fe(OH)2
FeO.
Câu 2: Hãy trình bày phương pháp hóa học để phân biệt 3 dung dịch đựng riêng biệt trong 3 lọ mất
nhãn là: H2SO4; Ba(OH)2; HCl .Viết phương trình hóa học(nếu có).( 1,0 điểm )
Câu 3: Dẫn 5,6 lít khí cacbon đioxit CO2 (ĐKTC) vào dung dịch nước vôi trong Ca(OH)2 vừa đủ
tạo ra m gam muối canxi cacbonat và nước.
a.Viết phương trình hóa học xảy ra.
b.Tính m ?.
c.Nếu trung hoà toàn bộ lượng nước vôi trong ở trên vào dung dịch axit clohidric 10% vừa đủ thì
khối lượng dung dịch axit cần dùng là bao nhiêu gam?. (2,5 điểm )
(Cho biết nguyên tử khối của các nguyên tố: Ca=40; C= 12; O=16; Cl=35,5; H=1).
BÀI LÀM:
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