Acidimetria si alcalimetria
Quiz
•
Chemistry
•
10th - 12th Grade
•
Hard
M Diana
Used 40+ times
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Pentru a doza Ca(OH)2 proba se poate titra cu:
soluție NaOH aprox. 0,1N cu factor de corecție cunoscut
soluție HNO3 aprox. 0,1N cu factor de corecție cunoscut
soluție Na2B4O7 exact 0,1N cu factor de corecție cunoscut
soluție NaCl aprox. 0,1N cu factor de corecție cunoscut
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Alegeti indicatorul care poate fi utilizat la titrarea cu o soluție de baza:
fenolftaleină
negru eriocrom T
roșu de metil
metilorange
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Precizați mediul de reacție în care indicatorul metiloranj suferă virajul de la: galben la portocaliu :
neutru
acid
bazic
nici una din răspunsurile precizate
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Factorul de corecție pentru soluția unui acid se poate determina cu soluției etalon:
acid oxalic
carbonat de sodiu
hidroxid de sodiu
hidroxid de bariu
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Factorul de corecție al unei soluții, determinat practic, trebuie să fie cuprins în intervalul:
9,0000 - 10,0000
0,9000 - 1,9000
0,9999 - 1,1111
0,9000 - 1,1000
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Soluţia de concentraţie cunoscută, preparată pentru a fi folosită la titrare se numeşte :
soluţie de analizat
titrant
titrat
reactiv de culoare
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Cantitatea de NaOH conţinută în 1000 ml soluţie de NaOH
0,1 N ( ANa = 23; AO = 16 ; A H = 1) este:
4g NaOH
2g NaOH
8g NaOH
3g NaOH
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