
ôn tập chương 4
Authored by UTB Khanh
Chemistry, Biology
University
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11 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Để làm sạch dung dịch KNO3 chứa tạp chất CuSO4 dùng dung dịch chứa chất tan nào sau đây?
A. Ba(OH)2.
B. Ba(NO3)2.
C. KOH.
D. K2S.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Để khử chua đất nông nghiệp dùng chất nào sau đây vừa thuận tiện và tiết kiệm chi phí?
A. CaCO3
B. CaO
C. Ca(OH)2
D. Ca(HCO3)2
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Biểu thức tính tích số tan của Pb(OH)2 khi biết độ tan S mol/l là
TPb(OH)2=2.S3
TPb(OH)2=S3
TPb(OH)2=4.S3
TPb(OH)2=2.S2
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Biểu thức tính tích số tan của Al(OH)3 khi biết độ tan S mol/l là
TAl(OH)3=9.S4
TAl(OH)3=27.S4
TAl(OH)3=9.S3
TAl(OH)3=S4
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cách pha chế 400 g dung dịch CuSO4 4% là như thế nào? Biết H=1; O=16, S=32, Cu=64
A. Lấy 48 gam CuSO4 dạng khan pha với 352 ml nước (d=1 g/ml).
B. Lấy 8,0 gam CuSO4 dạng khan pha với 392 ml nước (d=1 g/ml).
C. Lấy 32 gam CuSO4 dạng khan pha với 368 ml nước (d=1 g/ml).
D. Lấy 16 gam CuSO4 dạng khan pha với 384 ml nước (d=1 g/ml).
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A. 3,2.10-38.
B. 1,18.10-39.
C . 1,86.10-10.
D. 1,99.10-8.
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