Anatomy and Physiology : Chapter 2 Chemistry of Life Section 2

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Anatomy, Physiology, Chemistry, Water, Acids, Bases, pH,

What is the percentage of water in human body weight?

65%

Solution

A homogeneous mixture of two or more substances (a solute and a solvent).

Acid

Acompound that forms hydrogen ions (H+) in solution.

Base

A compound that forms hydroxil ions (OH-) in solution.

pH

A Scale showing the acidity or alkalinity of a solution.

pH Scale

<7- Acidic
>7- Basic
7- Neutral

What does "pH" stand for?

Potential of Hydrogen

Buffer

Compounds that stabilize the pH of a solution. They react to resist changes in pH if an acid or base is added to a solution

Salt

An ionic compound composed of a cation from a base and an anion from an acid.

Cation

Positive ion.

Anion

Negative ion.

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