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23 Nov 2019

Complete the charge balance equation for an aqueous solution of H2CO3 that ionizes to HCO3

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Jamar Ferry
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15 Sep 2019

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Related questions

complete the charge balance equation for an aqueous solution ofH2CO3 that ionizes to HCO3- and CO3^2-.
____ = ___ + ___ + ____

Carbonic acid ionizes in water as described in the equation below.
H2CO3 รขย†ย” H+ + HCO3-
It has a pKa value at 25 degC of 6.37.

Considering this information on carbonic acid, answer the following questions about a 340 mL sample of 0.029 M NaHCO3.

What mass of solid sodium bicarbonate would be required to make the 340 mL of the 0.029 M solution?

________________

What is the base dissociation constant, Kb, for this solution?

_____________________

What is the concentration of bicarbonate ions in the solution?
[HCO3-]= __________________

What is the pH of the 0.029 M NaHCO3 solution?

_____________________

What is the pH of a buffer prepared by dissolving 25.0 g of NaHCO3 in 500 mL of an aqueous solution saturated with CO2, where a saturated solution is 0.032 M in CO2?

Hint: When CO2 is dissolved in water it forms carbonic acid, H2CO3:

CO2(g)+H2O(l)---->H2CO3(aq)

H2CO3(aq)<---->H+(aq)+HCO3-(aq)

Ka=4.0x10^-7

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