4 đề kiểm tra hóa 8 hk2

ĐỀ 1
Câu 1(3đ): Viết phương trình hóa học biểu diễn các chuyển hóa sau. Cho biết mỗi phản ứng thuộc loại nào?
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 + ................ ( Fe + ........................
b. Zn + HCl ( ZnCl2 + ....................
c. Na2O + H2O ( ......................
d . Al + H2SO4 (loãng ) ( ? + ?
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):Viếtcôngthứchóahọcvàphânloạicácchấtsau
Bạcnitrat
Axitsunfuhidric
Axitphotphoric
Sắt (III) hiđrôxit
Canxihiđrôxit
Kali sunfat
Natriđihidrophotphat
Lưuhuỳnhtrioxit
Câu 4(3đ):Cho 4,6 gam kimloại Na tácdụnghếtvớioxi.
a) Viếtphươngtrìnhhóahọccủaphảnứngxảyra.
b) Tínhthểtíchoxithamgiaphảnứng (đktc).
c) Toànbộsảnphẩmđemhòa tan hếttrongnướcthìthuđược 160 gam dung dịch A. Tínhnồngđộphầntrămcủa dung dịch A.
d) Cầnthêmbaonhiêu gam Na vào A đểnồngđộ dung dịchtăngthêm 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):Phânloạicáchợpchấtcócôngthứchóahọcsau: K2O; Mg(OH)2; H2SO4; AlCl3; Na2CO3; CO2; Fe(OH)3; HNO3
Câu 3(2đ):Có 3lọ dung dịch: MgO, Na2O và SO2. Bằngphươngpháphóahọchãyphânbiệt 3 lọtrên.
Câu 4(3,5đ):Dẫnkhíhiđrolấydư qua 8,1g ZnOnungnóng.
a. Viếtphươngtrìnhhóahọccủaphảnứngxảyra.
b. Tínhthểtíchkhíhiđrocầndùng ở đktcvàkhốilượng Zn thuđược ?
c. Cho toànbộ Zn thuđượctrênvào 200 gam dung dịchaxitclohiđric (HCl) 7,3%. Hãytínhthểtíchkhíhiđrotạothành (đktc)?
d. Nếudẫnlượngkhíhiđrocầndùngchophảnứng ở câu a qua 3,24 gam FexOynungnóngthấyphảnứngvừađủ. XácđịnhcôngthứchóahọccủaFexOy?
Bài làm:
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ĐỀ 4
Câu 1(2đ): Đọctênvàphânloạicácchấtsau:KOH, BaO, H3PO4, ZnS, Fe(OH)3,CuO,H2SO3, Al2(SO4)3
Câu 2(2,5đ): Hoàn thành các phương trình phản ứng theo các sơ đồ sau ::
a. Sắt + axit clohiđric ----> Sắt II clorua + Hiđro
b. Caxi oxit + nước ----> Caxi hiđroxit
c. Kẻm + đồng II sunfat ----> Đồng + Kẻm sunfat
d. Kali + nước -----> Kali hiđroxit + Hiđro
e. Hiđro + Clo -----> axit clohiđric
Câu 3(2 đ): Bằng phương pháp hóa học phân biệt 3 lọ đựng: không khí, oxi, hidro
Câu 4(3 đ):Dùng 500 ml dung dịch H2SO4 1,2M để hoà tan hết lượng kim loại kẽm, phản ứng tạo thành kẽm sunfat và khí hiđro.
a) Viết phương trình hoá học của phản ứng.
b) Tính khối lượng muối kẽm sunfat thu được.
c) Dẫnkhíhiđrothuđược qua 48 gam sắt (III) oxitvàđunnóng. Tínhkhốilượngsắtthuđược?
Câu5:Đốtcháyhoàntoàn 7,