De thi HK II - Hoa hoc 8

Bài kiểm tra học kì II – Môn hóa học 8 – mã đề 01
Thời gian: 45 phút

Họ và tên: ……………………………………………….………………………………….. Lớp: ….......

Câu 1: (2 điểm)
Cho các chất sau: H2SO4, NaHCO3, Fe(OH)3, CaO, P2O5, HCl, NaOH, Ba(NO3)2.
Hãy gọi tên và phân loại các chất trên.
Câu 2: (2 điểm)
Có 4 gói chất bột trắng không có nhãn: CaO, P2O5, SiO2, Zn. Bằng phương pháp hóa học hãy phân biết các chất trên.
Câu 3: (2 điểm)
Biết 4,8 gam một kim loại hóa trị II tác dụng với dung dịch HCl dư thu được 4,48 lít khí (đktc). Xác định kim loại đem phản ứng.
Câu 4: (4 điểm)
Hòa tan 1,12 gam Fe trong 300 gam dung dịch H2SO4 9,8%.
Viết PTHH
Tính thể tích khí thoát ra (đktc)
Tính nồng độ phần trăm dung dịch sau phản ứng.

( Cho biết: Mg = 24, Fe = 56, H = 1, S = 32, O = 16)
Bài làm

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Bài kiểm tra học kì II – Môn hóa học 8 – mã đề 02
Thời gian: 45 phút

Họ và tên: ……………………………………………….………………………………….. Lớp: ….......

Câu 1: (2 điểm)
Cho các chất sau: Fe2O3, SO2, Na2O, SiO2, BaO, Fe3O4.
Gọi tên và phân loại các chất trên.
Chất nào tác dụng với nước? Viết PTHH.
Câu 2: (2 điểm)
Hoàn thành các phương trình hóa học sau:
Na + H2O ( ……. + …….
P2O5 + H2O ( ……………
K2O + H2O ( …………...
NO2 + H2O ( ……. + …….
Câu 3: (3 điểm)
Cho 9,2 gam kim loại natri vào 191,2 gam nước.
Tính thể tích khí thoát ra (đktc) sau phản ứng.
Tính nồng độ phần trăm dung dịch thu được.
Câu 4: (3 điểm)
Dùng khí hidro dư để khử hoàn toàn 3,2 gam một oxit sắt người ta thu được 2,24 gam Fe và 1,08 gam nước. Xác định công thức hóa học của oxit sắt.

(Cho biết: Na = 23, Fe = 56, H = 1, O = 16)
Bài làm

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