Part B At a pH of 7.40, what is the ratio of the molar concentrations of...

Question

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Part B

At a pH of 7.40, what is the ratio of the molar concentrations of HPO₄^2-to H₂PO^4-? Express your answer using two significant figures.

[HPO₄^2-] ⁄ [H₂PO^4-] = 19

Part C

At a pH of 7.40, what is the ratio of the molar concentrations of H₂PO₄^- to H₃PO₄? Express your answer using two significant figures.

[H₂PO₄^-] ⁄ [H₃PO₄] = 19

Part D

At a pH of 7.40, what is the ratio of the molar concentrations of CO₃^2- to HCO₃^-? Express your answer using two significant figures.

[CO₃^2- ] ⁄ [HCO₃^-] =

Part E

At a pH of 7.40, what is the ratio of the molar concentrations of HCO₃^- to H₂CO₃? Express your answer using two significant figures.

[ HCO₃^-] ⁄ [H₂CO₃] =

The following table gives the acid dissociation constant values, K_a, for carbonic acid, H₂CO₃ and phosphonc acid, H₃PO₄.

Acid	K_a1	K_a2	K_a3
H₂CO₃	4.3×10^-7	5.6×10^-11	not applicable
H₃PO₄	7.2×10^-5	6.2×10^-8	4.2×10^-13

pH of blood

The two most important inorganic blood buffers (acid-base conjugate pairs) are the phosphoric acid and carbonic acid systems. The pH of normal blood is 7.40 .

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The pH of blood is usually controlled by the brain the kidneys, and lungs. If the blood's pH fluctuates outside of its normal alkaline pH, it can cause harm to the body's tissues and organs. The system that helps control blood pH involves the creation of carbonate by kidneys.

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Jack Thomas · Accepted Answer

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Part B At a pH of 7.40, what is the ratio of the molar concentrations of…

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