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AveGali [126]
3 years ago
11

Una muestra de 2,36 gramos de NaHCO3 se descompuso completamente en un experimento. 2NaHCO3 → Na2CO3 + H2CO3 En este experimento

, el dióxido de carbono y los vapores de agua se combinan para formar H2CO3. Después de la descomposición, el Na2CO3 tenía una masa de 1,57 gramos. Determine la masa del H2CO3 producido. Calcule el porcentaje de rendimiento de H2CO3 para la reacción.
Chemistry
1 answer:
Tju [1.3M]3 years ago
5 0

Answer:

105%

Explanation:

El porcentaje de rendimiento se define como la masa obtenida del producto (En este caso, en términos de H2CO3), dividida en la masa teórica que debe ser producida.

La masa real se obtiene con las moles del otro producto que fueron producidas (Que son las mismas moles producidas de H2CO3)

Y la masa teórica se obtiene a partir de las moles de reactivo adicionadas:

<em>Masa teórica:</em>

2.36g NaHCO3 * (1mol / 84g) = 0.0281 moles de NaHCO3

0.0281 moles de NaHCO3 * (1mol H2CO3 / 2 moles NaHCO3) =

0.014 moles de H2CO3 son producidas. La masa es:

0.014 moles de H2CO3 * (62g / mol) = 0.871g es la masa teórica

<em>Masa real:</em>

1.57g Na2CO3 * (1mol / 106g) = 0.014 moles de Na2CO3

0.0148 moles de Na2CO3 * (1mol H2CO3 / 1 moles Na2CO3) =

0.0148 moles de H2CO3 son producidas. La masa es:

0.0148 moles de H2CO3 * (62g / mol) = 0.918g es la masa real producida

Así, el porcentaje de rendimiento es:

0.918g / 0.871g * 100 =

105%

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Answer:

0.20M

Explanation:

Step 1:

Data obtained from the question. This include the following:

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Step 2:

The balanced equation for the reaction. This is given below:

H2SO4 + 2LiOH —> Li2SO4 + 2H2O

From the balanced equation above,

Mole ratio of the acid, H2SO4 (nA) = 1

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Determination of the molarity of the acid, H2SO4. This can be obtain as follow:

MaVa/MbVb = nA/nB

Ma x 25 / 0.12 x 83.6 = 1/2

Cross multiply

Ma x 25 x 2 = 0.12 x 83.6

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Therefore, the molarity of the acid, H2SO4 is 0.20M.

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4 years ago
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Explanation:

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