
46-90
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Science
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Чудо Перьях
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45 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Чему равна концентрация [OH-] если [H+]=10-4?
Чему равна концентрация [OH-] если [H+]=10-4?
10-10
10-4
10-7
10-14
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Чему равна концентрация ионов водорода (моль/л) в водном растворе с рОН =11?
10-11
10-9
10-3
10-1
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Чему равен рН раствора гидроксида натрия с CNaOH = 0.001 моль/л?
9
11
2
10-12
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Чему равна константа ионизации Кb для раствора слабого однокислотного основания с концентрацией 0,1 моль/л и степенью ионизации а = 0.001?
10-3
10-1
10-5
10-7
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Чему равна степень ионизации а для раствора слабого однокислотного основания с концентрацией 0,1 моль/л и константой ионизации Кb равной 10-7?
0,001
0,01
0,1
10-5
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Изотоничен по отношению к плазме крови раствор...
0,01%-ный раствор NaCl
0,9%-ный раствор NaCl
10%-ный раствор NaCl
0,01M раствор NaCl
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Соотношение [H+] < [OH-] соблюдается в водных растворах...
CH3COOH
H3PO4
NH4OH
NaCl
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