
Kiểm tra
Authored by Thu Thao Nguyen Thi
Chemistry
11th Grade - University
Used 2+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho các chất: NaOH,Na2CO3,Ca(OH)2, CaCO3, CH3COONa, C2H5OH,C2H5ONa, HCl, H2SO4,BaCl2, BaSO4. Số các chất khi cho thêm nước tạo thành dung dịch dẫn điện là:
8
9
10
11
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Cho dung dịch CH3COOH có cân bằng CH3COOH ⇄ CH3COO- + H+
Dung dịch chứa những ion nào?
CH3COOH,H+,CH3COO-
H+,CH3COOH
H+,CH3COO-
H2O,CH3COOH
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Công thức tính pH
pH = - log [H+]
pH = log [H+]
pH = +10 log [H+]
pH = - log [OH-]
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Trộn lẫn dung dịch chứa 1g NaOH với dung dịch chứa 1g HCl,dung dịch thu được có giá trị
pH>7
pH=7
pH<7
pH=8
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Phản ứng nào sau đây không phải phản ứng trao đổi ion?
MgSO4 + BaCl2 ® MgCl2 + BaSO4
HCl + AgNO3 ® AgCl + HNO3
2NaOH + CuCl2 ® 2NaCl + Cu(OH)2
Cu + 2AgNO3 ® Cu(NO3)2 + 2Ag
6.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Cho các ion: Fe3+, Ag+, Na+, NO3-, OH-, Cl- . Các ion nào sau đây tồn tại đồng thời trong dung dịch?
Fe3+, Na+, NO3-, OH-
Na+, Fe3+, Cl-, NO3-
Ag+, Na+, NO3-, Cl-
Fe3+, Na+, Cl-, OH-
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Dung dịch X chứa : a mol Ca2+, b mol Mg2+, c mol Cl- và d mol NO3-. Biểu thức nào sau đây biểu diễn mối quan hệ giữa a,b,c,d?
2a+2b = c+d
a+b = c+d
a+b = 2c+2d
2a+c = 2b+d
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