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tensa zangetsu [6.8K]
3 years ago
9

In an experiment you are asked to react hydrochloric acid with sodium hydroxide. When measuring the volume of the reactants, whi

ch instrument would give the greatest precision?
Chemistry
1 answer:
Bingel [31]3 years ago
7 0
What are the options? based on the volume it can differ but in general pipettes and graduated cylinder are the best.  <span />
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When work is done on an object, the amount of ________ it has changes.
arsen [322]
Hey there!

When work is done on an object, the amount of energy it has changes.

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~Autumly
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3 years ago
Determine el PH y el % de disociación de una solución de ácido débil, sabiendo que se disuelven 20 gramos del ácido (masa molar=
IceJOKER [234]

Answer:

pH = 4.27. Porcentaje de disociación: 0.03%

Explanation:

El pH de un ácido débil, HX, se obtiene haciendo uso de su equilibrio:

HX(aq) ⇄ H⁺(aq) + X⁻(aq)

Donde la constante de equilibrio, Ka, es

Ka = 1.65x10⁻⁸ = [H⁺] [X⁻] / [HX]

Como los iones H⁺ y X⁻ vienen del mismo equilibrio podemos decir:

[H⁺] = [X⁻]

[HX] es:

20g * (1mol/55g) = 0.3636moles / 2.100L = 0.1732M

Reemplazando es Ka:

1.65x10⁻⁸ = [H⁺] [H⁺] / [0.1732M]

2.858x10⁻⁹ = [H⁺]²

5.35x10⁻⁵M = [H⁺]

pH = -log[H⁺]

<h3>pH = 4.27</h3>

El porcentaje de disociacion es [X⁻] / [HX] inicial * 100

Reemplazando

5.35x10⁻⁵M / 0.1732M * 100

<h3>0.03%</h3>
5 0
2 years ago
Please help I’m marking a branliest answer ☹️☹️☹️☹️☹️☹️
Doss [256]
The answer would be C
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2 years ago
What are the radicals?Write their types with four examples.​
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<h3>A<em><u> group of atoms behaving as a unit in a number of compounds.</u></em><em><u> </u></em></h3>

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3 years ago
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