
Ácidos 1° ano
Authored by LETICIA TEIXEIRA BERTAGI
Science
10th Grade
Used 13+ times

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20 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
(Esal-MG) Uma solução aquosa de H3PO4 é ácida devido à presença de:
água
fosfato
Hidrônio
Hidrogênio
2.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
Assinale a alternativa que apresente somente ácidos fracos
HCl, HF, HCN
HCN, H3PO4, HNO3
H2S, HF, HNO2
H2S, HCN, H3BO3
3.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
O ácido fosforoso apresenta fórmula...
HF
H3PO4
H3PO3
H3PO2
4.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
(USJT-SP) O ácido cianídrico é o gás de ação venenosa mais rápida que se conhece: uma concentração de 0,3 mg por litro de ar é imediatamente mortal. É o gás usado nos estados americanos do Norte, que adotam a pena de morte por câmara de gás. A primeira vítima foi seu descobridor, Carl Wilhelm Sheele, que morreu ao deixar cair um vidro contendo solução de ácido cianídrico, cuja fórmula molecular é:
HCOOH
HCN
HCNS
HCNO
5.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
Em relação ao número de hidrogênios ionizáveis o ácido sulfúrico é um..
tetrácido
triácido
diácido
monoácido
6.
MULTIPLE CHOICE QUESTION
5 mins • 5 pts
A equação de ionização completa do ácido fluorídrico é corretamente representada como...
H3PO4 + H2O → H3O+ + H2PO4-
H3PO3 + H2O → 2H3O+ + HPO32-
H3PO4 + H2O → 3H3O+ + PO43-
HF + H2O → H3O+ + F-
7.
MULTIPLE SELECT QUESTION
5 mins • 5 pts
Somos oxiácidos
HCl
H2SO3
H2BO3
NaCl
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