4 Đề kiểm tra Hóa 8 học kì 2

ĐỀ 1
Câu 1(3đ): Viết phương trình hóa học biểu diễn các chuyển hóa sau. Cho biết mỗi phản ứng thuộc loại nào? 
(3)
(4)
(2)
(1)
 SO3 H2SO4 H2 Fe Fe3O4
Câu 2(2đ): Có 4 lọ mất nhãn đựng riêng biệt đựng 4 dung dịch sau: KOH, Ca(OH)2, HCl, NaCl. Trình bày phương pháp hóa học để nhận biết được các chất trong mỗi lọ.Viết PTHH (nếu có).
Câu 3(2đ): Gọi tên, phân loại các chất sau: Fe(OH)3, NaOH, SO3, H2SO4, H3PO4, CuO, ZnS, Ca(HCO3)2 
Câu 4(3đ): Cho 13 gam kẽm phản ứng hoàn toàn với dung dịch HCl.
a. Viết phương trình hoá học
b. Tính thể tích khí hidro sinh ra (đktc)
c. Nếu dùng toàn bộ lượng H2 ở trên đem khử 12 gam bột CuO ở nhiệt độ cao thì chất nào còn dư bao nhiêu gam?
d. Tính nồng độ phần trăm của dung dịch HCl khi hòa tan toàn bộ khối lượng dung dịch trên vào 100g nước.
Bài làm:
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ĐỀ 2
B/ Tự luận (8đ)
Câu 1(3đ): Hoàn thành các sơ đồ phản ứng sau và cho biết chúng thuộc loại phản ứng nào?
 a. Fe2O3 + ................ à Fe + ........................
 b. Zn + HCl à ZnCl2 + ....................
 c. Na2O + H2O à ......................
 d . Al + H2SO4 (loãng ) à ? + ?
Câu 2(2đ): Có ba lọ chứa ba khí riêng biệt không màu, không mùi là H2 , O2 , CO2 . Bằng phương pháp hóa học hãy nêu cách nhận biết ba khí đó?
Câu 3(2đ): Viết công thức hóa học và phân loại các chất sau 
Bạc nitrat
Axit sunfuhidric
Axit photphoric 
Sắt (III) hiđrôxit
Canxi hiđrôxit
Kali sunfat
Natri đihidrophotphat
Lưu huỳnh trioxit
Câu 4(3đ): Cho 4,6 gam kim loại Na tác dụng hết với oxi.
a) Viết phương trình hóa học của phản ứng xảy ra.
b) Tính thể tích oxi tham gia phản ứng (đktc).
c) Toàn bộ sản phẩm đem hòa tan hết trong nước thì thu được 160 gam dung dịch A. Tính nồng độ phần trăm của dung dịch A.
d) Cần thêm bao nhiêu gam Na vào A để nồng độ dung dịch tăng thêm 5%.
Bài làm:
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ĐỀ 3
B/ Tự luận (8đ)
Câu 1(2,5đ): Viết phương trình hóa học thực hiện dãy chuyển hóa sau:
KClO3 → O2 → CaO → Ca(OH)2 →CaCO3 → CaO
Câu 2(2đ): Phân loại các hợp chất có công thức hóa học sau: K2O; Mg(OH)2; H2SO4; AlCl3; Na2CO3; CO2; Fe(OH)3; HNO3
Câu 3(2đ): Có 3 lọ dung dịch: MgO, Na2O và SO2. Bằng phương pháp hóa học hãy phân biệt 3 lọ trên.
Câu 4(3,5đ): Dẫn khí hiđro lấy dư qua 8,1g ZnO nung nóng. 
a. Viết phương trình hóa học của phản ứng xảy ra.
b. Tính thể tích khí hiđro cần dùng ở đktc và khối lượng Zn thu được ?
c. Cho toàn bộ Zn thu được trên vào 200 gam dung dịch axit clohiđric (HCl) 7,3%. Hãy tính thể tích khí hiđro tạo thành (đktc)?
d. Nếu dẫn lượng khí hiđro cần dùng cho phản ứng ở câu a qua 3,24 gam FexOy nung nóng thấy phản ứng vừa đủ. Xác định công thức hóa học của FexOy? 
Bài làm:
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