Phosphate Buffer System

H₂PO₄⁻ ⇌ HPO₄²⁻ + H⁺

Tổng quan

The dihydrogen phosphate/hydrogen phosphate buffer system operates near pH 7.2, making it ideal for biological applications. With pKa2 = 7.2, it buffers effectively between pH 6.2 and 8.2. This is the buffer system used in phosphate-buffered saline (PBS), the most common buffer in biology.

Người tham gia

Vai trò	Chất	Hệ số	Trạng thái
Chất phản ứng	Phosphoric Acid H₃PO₄	1	(aq)

Ví dụ thực tế

Phosphate buffers help maintain the pH of many biological fluids and are used in nearly every molecular biology laboratory.

Tầm quan trọng công nghiệp

The phosphate buffer system is used in PBS for cell culture, in clinical diagnostics, in food processing, and in pharmaceutical formulations requiring near-neutral pH.

Tính chất

Loại: Acid-Base
Thuận nghịch: Có
Năng lượng: Thu nhiệt

Phản ứng liên quan

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Frequently Asked Questions

What is the equation for Phosphate Buffer System?

The balanced equation is: H₂PO₄⁻ ⇌ HPO₄²⁻ + H⁺.

What type of reaction is Phosphate Buffer System?

Phosphate Buffer System is a acid-base reaction. It is reversible under certain conditions.

Is Phosphate Buffer System exothermic or endothermic?

Phosphate Buffer System is endothermic (absorbs energy).