
Evaluare Soluții Chimice
Authored by Oana Voinea
Instructional Technology
10th Grade

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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Care este formula pentru calculul concentrației procentuale masice a unei soluții?
masa solutmasa solutie×100
masa solventmasa solutie×100
masa solutmasa solvent×100
volum solutvolum solutie×100
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ce reprezintă concentrația molară (M)?
Numărul de moli de solvent per litru de soluție
Numărul de moli de solut per litru de soluție
Numărul de grame de solut per litru de soluție
Numărul de echivalenți-gram per litru de soluție
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pentru o soluție de NaOH 2N, care este concentrația molară?
4M
1M
2M
0.5M
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Care este definiția normalității unei soluții?
Numărul de moli de solut per kilogram de solvent
Numărul de echivalenți-gram de solut per litru de soluție
Numărul de moli de solut per litru de soluție
Masa de solut per 100g de soluție
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pentru prepararea unei soluții de 20% NaCl, câte grame de NaCl sunt necesare pentru 400g de soluție?
40g
80g
100g
60g
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