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Kamila [148]
3 years ago
7

12

Chemistry
1 answer:
elixir [45]3 years ago
7 0

Answer:

no le entiendo pero si me se la respuesta ya tu sabe ✨✨✨✨

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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>
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How do I do scientific notation
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1. First, move the decimal place until you have a number between 1 and 10. If you keep moving the decimal point to the right in 0.0000073 you will get 7.3.
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What is significant about 42?​
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It’s twice as much as 9+10

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Chondroitin sulfate is abundant in the matrix of
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The correct answer to this is:

<span>Chondroitin sulfate is abundant in the matrix of <u>“Cartilage”.</u></span>

<span>A 1 unit of Chondroitin sulfate has a chemical formula of C</span>13H21NO15<span>S. It is usually found attached to proteins as part of a proteoglycan and is a vital structure of cartilage by providing much resistance to compression. Due to this, this chemical has found wide use as a dietary supplement for treatment of osteoarthritis.</span>

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