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Chemistry
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Classifique a solução em ácida, básica ou neutra de pH=7
ÁCIDA
BÁSICA
NEUTRA
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Classifique a solução em ácida, básica ou neutra de pH<7
ÁCIDA
BÁSICA
NEUTRA
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Classifique a solução em ácida, básica ou neutra de pH>7
ÁCIDA
BÁSICA
NEUTRA
4.
MULTIPLE CHOICE QUESTION
3 mins • 4 pts
qual destas fórmulas representa um ácido ?
NaOH
Nacl
CO2
HCl
5.
MULTIPLE CHOICE QUESTION
3 mins • 4 pts
De acordo com a escala de pH, em qual faixa se encontra as bases?
A
B
C
6.
MULTIPLE CHOICE QUESTION
3 mins • 5 pts
Para combater a acidez estomacal causada pelo excesso de ácido clorídrico, costuma-se ingerir um anti-ácido. Das substâncias abaixo, encontradas no cotidiano das pessoas, a mais indicada para combater a acidez é:
o refrigerante.
o suco de laranja.
o vinagre.
o leite de magnésia.
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
I) P2O5 + 3 H2O → 2 H3PO4
II) 2 KClO3 → 2 KCl + 3 O2
III) 3 CuSO4 + 2 Al → Al2(SO4)3 + 3 Cu
As equações I, II e III representam, respectivamente, reações de:
síntese, análise e simples troca.
análise, síntese e simples troca.
simples troca, análise e análise.
síntese, simples troca e dupla troca.
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