Acidi e basi
Quiz
•
Chemistry
•
9th Grade
•
Practice Problem
•
Hard
Lisa Pellizzari
Used 8+ times
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7 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Il punto di viraggio di un indicatore:
si ha quando la forma ionizzata e quella protonata raggiungono l’equilibrio
è a pH 7
si ha quando le sue molecole cambiano colore
si ha quando la forma ionizzata e quella protonata raggiungono concentrazioni circa uguali
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
In quale delle seguenti reazioni l’acqua si comporta da base?
HCOO– + H2O → HCOOH + OH–
HCO3– + H2O → H2CO3 + H3O+
HCO3– + H2O → H2CO3 + OH–
HCN + H2O → CN– + H3O+
3.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Seleziona gli indicatori adatti a titolare una soluzione acida
blu di timolo
intervallo di viraggio 1,2 - 2,7
blu di bromofenolo
intervallo di viraggio 3,0 - 4,6
rosso di fenolo
intervallo di viraggio 6,8 - 8,4
timolftaleina
intervallo di viraggio 9,3 - 10,5
4.
FILL IN THE BLANK QUESTION
30 sec • 1 pt
La soluzione è acida, basica o neutra? [H+] = 5,6 x 10−3 M
5.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Quali delle seguenti coppie possono formare soluzioni tampone?
HCl/NaCl
HF/NaF
KOH/KCl
NH3/NH4Cl
6.
MULTIPLE SELECT QUESTION
30 sec • Ungraded
Cosa ti è piaciuto di più del corso?
Esperimenti
Simpatia del docente
Modalità delle verifiche
Materiali di supporto
Laboratorio
7.
OPEN ENDED QUESTION
30 sec • Ungraded
Suggerimenti per migliorare il corso
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