
hoá ck I
Authored by Phương Nguyễn
Science
11th Grade
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17 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Một mẫu nước mưa có pH=4,82. Vậy nồng độ H+ trong đó là
[H+] = 1,0.10^(-4) M
[H+] >1,0.10^(-5)
[H+] =1,0. 10(-5)
[H+] <1, 0.10(-5)
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Chất nào sau đây là chất điện li
C6H6
NaOH
C2H5OH
C12H22O11
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Tính chất nào sau đây đúng với dung dịch axit ở 25 độ c
[H+] > [OH-], pH>7
[H+] >[OH-], pH<7
[H+] <[OH-], pH>7
[H+] <[OH-], pH>7
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Phát biểu không đúng là
Môi trường base có pH<7
Môi trường base có pH>7
Môi trường trung tính có pH=7
Đôi môi trường acid có pH<7
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Dung dịch nào sau đây làm xanh quỳ tím
HCl
Na₂SO₄
NaOH
KCl
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cho các phản ứng:
NH₄⁺ + H₂O ↔ NH₃ + H₃O
S²⁻ + H₂O ↔ HS⁻ +OH⁻
Dựa theo thuyết Bronsted-Lowry chọn đáp án đúng
S²⁻ là acid, NH₄⁺ là base
S²⁻ là base, NH₄⁺ là axit
S²⁻ là acid, NH₄⁺ là acid
S²⁻ là base, NH₄⁺ là base
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Theo thuyết Bronsted-Lowry, chất nào sau đây là chất lưỡng tính
Mg²⁺
NH₃
HCO₃
SO₃²⁻
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