Solutii
Quiz
•
Chemistry
•
7th Grade
•
Practice Problem
•
Hard
Casu Nicoleta
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10 questions
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1.
MULTIPLE SELECT QUESTION
1 min • 1 pt
Este adevarata afirmatia:
Concentratia procentuala reprezinta cantitatea de substanta dizolvata in 1000 grame solutie;
Masa solutie se noteaza cu md
md reprezinta masa dizolvantului
Concentratia procentuala are urmatoarea relatie de calcul:
c% = md*100/ms
2.
MULTIPLE SELECT QUESTION
1 min • 1 pt
In functie de masa dizolvatului masa solutiei poate fi scrisa ca fiind suma dintre :
md + m apa
ms + m apa
md + ms
3.
MULTIPLE SELECT QUESTION
1 min • 1 pt
Soluţiile sunt amestecuri omogene formate din 2 sau mai multe substanţe între care………….fenomene chimice
Au loc
Nu au loc
4.
MULTIPLE SELECT QUESTION
1 min • 1 pt
In 600 g solutie se gasesc 50 g sare de bucatarie. Concentratia solutiei este:
83%
8,33%
83,3%
8%
5.
MULTIPLE SELECT QUESTION
1 min • 1 pt
Calculeaza concentratia procentuala obtinuta prin dizolvarea a 65 g zahar in 135 g apa.
3,25%
65%
32,5%
6.
MULTIPLE SELECT QUESTION
1 min • 1 pt
Calculeaza masa de substanta dizolvata necesara pentru a obtine 500 g solutie de concentratie 50 %.
250g
25g
0,25Kg
2,5 kg
7.
MULTIPLE SELECT QUESTION
1 min • 1 pt
Soluțiile diluate conțin:
cantitate mică de substanță dizolvată
cantitate mare de substanță dizolvată
cantitate mică de apă
cantitate mare de apă
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