Petrolul este un exemplu de solvent:
Solutii - solubilitate si cristalohidrati

Quiz
•
Chemistry
•
9th Grade
•
Hard
Ianculescu Florina
Used 15+ times
FREE Resource
9 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
polar
nepolar
izolator
2.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
Prin dipol intelegem
moleculă polară
molecula nepolară
molecula ambipolară
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Iodura de sodiu se dizolvă în:
tetraclorură de carbon
apă
nu se dizolvă
4.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
Numarul de moli de substanta dizolvata intr-un litru de solutie reprezinta
molaritatea
normalitatea
concentrația procentuală
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Substantele solide, cristaline, in a caror compozitie nu intra molecule de apa se numesc
cristalohidrați
higroscopice
anhidre
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Masa de apa ce trebuie adaugata peste 300 g solutie de iodura de potasiu 15% pentru a obtine o solutie de concentratie 12% este:
264
75
36
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
1. alcool a. dizolva soda caustic
2. apa si petrol b. solvent nepolar
3. apa c. amestec omogen
4. CCl4 d. dizolva iodul
5. alcool si iod e. amestec eterogen.
Alegeti varianta corecta:
1b, 2e, 3a, 4a, 5c
1a, 2e, 3b, 4b, 5c
1d, 2e, 3a, 4b, 5c
8.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Procentul de apă de cristalizare continut de piatra vânătă este:
64%
36%
7,2%
9.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cantitatea de calciu din 51,6 grame de ghips este:
120 grame
12 grame
136 grame
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