
BIMESTRAL QUÍMICA 9
Authored by cienciasyermoyparres Parres
Chemistry
9th Grade

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10 questions
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1.
OPEN ENDED QUESTION
3 mins • 1 pt
El químico danés Sörensen, ideó una escala de grado de acidez, en la cual la concentración de iones H+ o H3O+ se expresa como el logaritmo decimal de la misma cambiado de signo, que equivale al exponente o potencia de dicha concentración. De acuerdo con la definición anterior, escribe la ecuación para calcular el pH.
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2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
EL AGUA ES UN SOLVENTE UNIVERSAL PARA TODAS LAS DISOLUCIONES QUE EXISTEN, ESTA ES UNA SUSTANCIA:
ÁCIDA
BÁSICA
NEUTRA
NINGUNA DE LAS ANTERIORES
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Selecciona la opción correcta, para la siguiente afirmación: "una sustancia es ácida si, al ionizarse en el agua libera iones H+ o protones, y una sustancia es básica si, al disolverse en el agua libera grupos OH– o iones hidroxilo"
FALSO
VERDADERO
NO SABE/NO RESPONDE
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
EL PH QUE PERMITE DETERMINAR SI UNA SUSTANCIA ES ÁCIDA O NO VA DESDE LOS SIGUIENTES VALORES:
0 A 1
7 A 12
0 A 7
1 A 13
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
pH = -1,45
pOH= -12,55
pH = 1,45
pOH = 12,55
pH = -2
pOH= -12,55
pH= 2
pOH= 12,55
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
pOH = -7
pOH = -7,8
pOH = 7
pOH = 7,8
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
pH = 10
pH = 6
pH = 5
pH= -5
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