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Human blood contains one buffer system based on phosphate species and one based on carbonate species. Assuming that blood has a normal pH of 7.4, what are the principal phosphate and carbonate species present? What is the ratio of the two phosphate species? (In the presence of the dissolved ions and other species in blood, Kₐ₁ of H₃PO₄ = 1.3x10⁻², Kₐ₂ = 2.3x10⁻⁷and Kₐ₃ = 6x10⁻¹², Kₐ₁ of H₂CO₃ = 8x10⁻⁷ and Kₐ₂ = 1.6x10⁻¹⁰

Respuesta :

The ratio of the two phosphate species [HPO4^2] / [H2PO4] is 5.75

How does human blood work as a buffer system?

The bicarbonate ions neutralize the hydronium ions and produce carbonic acid and water if an acidic substance enters the bloodstream.

The blood's buffering mechanism already includes carbonic acid. As a result, hydronium ions are eliminated, keeping the blood's pH from becoming acidic.

What type of buffer system does our blood have?

Plasma proteins, phosphate, as well as bicarbonate and carbonic acid buffers, all operate as part of the blood plasma's buffer systems.

The kidneys contribute to the regulation of acid-base balance by eliminating hydrogen ions and producing bicarbonate, which helps keep the pH of blood plasma within a normal range.

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