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Debora [2.8K]
1 year ago
13

What would the corresponding

Chemistry
1 answer:
ad-work [718]1 year ago
4 0

Answer:

7,9,11

Explanation:

this is because water includes 0H, which would mean that it is more than 6

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Calculate the pH at 25 degrees celsius of a 0.39 M solution of pyridinium chloride (c5h5nhcl) . Note that pyridine (c5h5n) is a
lutik1710 [3]

Answer:

pH=2.3

Explanation:

Hello!

In this case, since pyridinium chloride has a pKb of 8.77 which is a Kb of 1.70x10⁻⁹ and therefore a Ka of 5.89x10⁻⁵ which means it tends to be acidic, we write its ionization via:

C_5H_5NHCl(aq)+H_2O(l)\rightleftharpoons C_5H_5NCl^-(aq)+H_3O^+(aq)

Because it is a Bronsted base which donates one hydrogen ion to the water to produce hydronium. Thus, we write the equilibrium expression with the aqueous species only:

Ka=\frac{[C_5H_5NCl^-][H_3O^+]}{[C_5H_5NHCl]}

In terms of the reaction extent x, we write:

5.89x10^{-5}=\frac{x*x}{0.39-x}

Thus, solving for x we obtain:

x_1=-0.0048M\\\\x_2=0.0048M

Clearly the solution is 0.0048 M because to negative values are not allowed, therefore, since it equals the concentration of hydronium which defines the pH, we write:

pH=-log([H_3O^+])=-log(0.0048)\\\\pH=2.3

Best regards!

5 0
3 years ago
What is the final volume of a 400 ML sample that is subjected To a temperature change from 22 Celsius to 30 Celsius in a pressur
bija089 [108]

Answer:

The answer to your question is  V2 = 867.3 mL

Explanation:

Data

Volume 1 = V1 = 400 ml

Temperature 1 = T1 = 22°C

Pressure 1 = P1 = 760 mmHg

Volume 2 = V2 = ?

Temperature 2 = T2 = 30°C

Pressure 2 = P2 = 360 mmHg

Process

1.- Convert Celsius to Kelvin

T1 = 22 + 273 = 295°K

T2 = 30 + 273 = 303°K

2.- Use the Combined gas law

              P1V1/T1 = P2V2/T2

- Solve for V2

            V2 = P1V1T2 / T1P2

- Substitution

            V2 = (760 x 400 x 303) / (295 x 360)

- Simplification

            V2 = 92112000 / 106200

-Result

            V2 = 867.3 mL

8 0
3 years ago
1. Se tiene 360 mL de solución de sulfato de plata con densidad 1,75 g/mL y al 7%, se añaden
yawa3891 [41]

Explanation:

hhjcynuu7 was the only person who

3 0
3 years ago
Write the mole ratios of (2ca+o2➡2cao)
tresset_1 [31]
N(Ca)/2 = n(O)/1 = n(CaO)/2

The calcium and the Calcium Oxide are divided by 2 because of their coefficients
there is no number in front of the oxygen so it is over one.
Hope this helped!!
6 0
3 years ago
Read 2 more answers
Select the correct answer.
Fittoniya [83]

Answer:

subscribe to me on you-tube for brainliest custom link since u cant do a you-tube link :/

https://screenshare.host/B7N8NT

Explanation:

7 0
3 years ago
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