
Acidez e basicidade - Indicadores de pH
Authored by Izamara Rosa
Chemistry
Professional Development
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5 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Abaixo são apresentadas algumas substâncias presentes no cotidiano e seus respectivos valores aproximados de pH. Assinale a alternativa que apresenta apenas as substâncias ácidas.
Vinagre pH = 3,0
Sabonete pH = 11,0
Amônia pH = 11,5
Leite pH = 6,0
Suco de limão pH = 2,5
Sangue humano pH = 7,35 - 7,45
Vinagre, sangue humano e amônia
Leite, amônia e sabonete
Vinagre, suco de limão e leite
Sabonete, sangue humano e amônia
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Assinale quais são essas substâncias após serem misturadas com água de repolho roxo
vermelho: limão - verde: água sanitária
vermelho: água sanitária
verde: limão
3.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Para saber se as substâncias são ácidas ou básicas devemos colocar na língua para identificar.
Falso
Verdadeiro
4.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Analise essas reações e assinale se as substâncias são ácidas ou básicas, respectivamente:
ácida e ácida
ácida e básica
básica e ácida
básica e básica
5.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Segundo Arrhenius, não é possível que uma solução aquosa conduza corrente elétrica
Verdadeiro
Falso
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