gavenverhelst9669 gavenverhelst9669
  • 02-10-2019
  • Chemistry
contestada

With CO2 of 409.15 ppm and a temperature of 31.1 degrees Celsius, determine the pH of Water.

Respuesta :

gbustamantegarcia054 gbustamantegarcia054
  • 11-10-2019

Answer:

pH = 4.2

Explanation:

  • CO2 + H2O → H2CO3

∴ C CO2 = 409.15 mg/L * ( g/1000mg ) * ( mol CO2/44.01g ) = 9.296 E-3 mol/L

  • H2CO3 ↔ HCO3 -  +  H3O+

∴ Ka = 4.3 E-7 = [H3O+] * [HCO3-] / [H2CO3]

mass balanace:

⇒ C H2CO3 = C CO2 = 9.296 E-3 = [H2CO3] + [HCO3-]

⇒ [H2CO3] = 9.296 E-3 - [HCO3-]

charge balance:

⇒ [H3O+] = [HCO3-]

⇒ 4.3 E-7 = [H3O+]² / ( 9.296 E-3 - [H3O+] )

⇒ [H3O+]² + 4.3 E-7 [H3O+] - 3.997 E-9 = 0

⇒ [H3O+] = 6.300 E-5 M

⇒ pH = - Log [H3O+]

⇒ pH = - Log ( 6.3 E-5 )

⇒ pH = 4.2

Answer Link

Otras preguntas

PLEASE HELP ASAP BESTIES I WILL GIVE BRAINLIEST Express as a trinomial.(2x – 9)(3x +4)
In 2020, Metlock Corporation had net cash provided by operating activities of $569,000, net cash used by investing activities of $988,000, and net cash provided
was Abraham Lincoln the cause of the Civil War or simply the straw that finally broke the country? Explain your answer.
plzzzzzzzz help meeeeeeee
What is the cost of 18 toy cars? O $12 O $20 O $22. O $27
how many four digit numbers can be formed without using the digits 5 or 7?
Reconoce cual es una magnitud vectorial. * 2 puntos a) tiempo b) altura c) Longitud d) Aceleración e) Densidad.
Which represents the value of s in s + 12 = 100?
Why do we not see a solar and lunar eclipse every lunar cycle?
What Were The TWO Underlying Causes Of World War ll