TH HPT1_test 1
Quiz
•
Chemistry
•
University
•
Hard
Tuấn Văn
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Lượng NaOH cần thiết để pha chế 100ml dung dịch 0,1N là?
4 g
40 g
400 g
400 mg
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Theo học thuyết bronsted-lowry NaOH là base bởi vì?
có khả năng cho ion OH-
có khả năng cho ion H+
có khả năng nhận ion H+
có pH trên 7
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Chỉ thị nào sau đây có khoảng pH đổi màu là 8,3-10?
Heliantin
Đỏ methyl
Xanh bromothymol
Phenolphtalein
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hệ số hiệu chỉnh của dung dịch chuẩn NaOH 0,1N là bao nhiêu nếu nồng độ thực tế là 0,0950N?
0,0950
0,95
0,9500
1,0523
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Trong thí nghiệm chuẩn độ NaOH bằng HCl dùng chỉ thị phenolphatalein, dung dịch NaOH được bố trí ở vị trí nào?
bình định mức
bình nón
buret
cốc có mỏ
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Chỉ thị da cam methyl (heliantin) có khoảng pH đổi màu là?
8,3-10
6,2-7,6
4,4-6,2
3,1-4,4
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Sản phẩm phản ứng giữa NaOH và HCl là?
NaCl + Cl2
NaCl + O2
NaCl + H2
NaCl + H2O
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