Acizi și baze
Flashcard
•
Chemistry
•
12th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
Ce este un acid conjugat?
Back
Un acid conjugat este specia chimică care rezultă din donarea unui proton (H+) de către un acid. De exemplu, HCl devine Cl- după ce donează un proton.
2.
FLASHCARD QUESTION
Front
Ce este o bază conjugată?
Back
O bază conjugată este specia chimică care rezultă din acceptarea unui proton (H+) de către o bază. De exemplu, NH3 devine NH4+ după ce acceptă un proton.
3.
FLASHCARD QUESTION
Front
Care este definiția pH-ului?
Back
pH-ul este o măsură a acidității sau alcalinității unei soluții, definită ca logaritmul negativ al concentrației ionilor de hidroniu [H3O+].
4.
FLASHCARD QUESTION
Front
Cum se calculează pH-ul unei soluții de acid?
Back
pH = -log[H3O+]. De exemplu, pentru o soluție de HCl 0,1 mol/L, pH = -log(0,1) = 1.
5.
FLASHCARD QUESTION
Front
Ce reprezintă produsul ionic al apei?
Back
Produsul ionic al apei este [H3O+][OH-] = 10^-14 mol²/L² la 25°C.
6.
FLASHCARD QUESTION
Front
Ce caracter are o soluție cu [H3O+] = [OH-]?
Back
O soluție cu [H3O+] = [OH-] este considerată neutră, având un pH de 7.
7.
FLASHCARD QUESTION
Front
Ce este un acid puternic?
Back
Un acid puternic este un acid care se disociază complet în apă, eliberând toți protonii săi. Exemple includ HCl, HNO3 și H2SO4.
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