Chapter 2 Part 2 Flashcards
Mixtures
Physically blended but not chemically combined
Solvency
Ability to dissolve other chemicals
Hydrophilic examples
Ions polar molecules, anything with a charge
Hydrophobic examples
No polar, neutral or uncharged
Metabolic reactions depends on
Solvency in water
Will polar ions and molecules mix with water
Yes
Will non polar ions mix with water
No
Adhesion
Water adheres to other substances
Cohesion
Water molecules cling to each other
Chemical reactivity
Ability to participate in chemical reactions
Hydrolysis
Breaking down large molecules into smaller ones
Dehydration synthesis
Joins 2 simple molecules to form a large molecule
Solution
Usually small enough to pass through a cell membrane, solutes small and dissolved in solvent
Acid
A substance that dissociates in solution that produce hydrogen ions
Base or alkaline
A substance that dissociates in solutions to yield cations and hydroxide ions
Salt
A substance that dissociates in solution producing cations and anions not hydrogen ions or hydroxide ions
Ph scale
Acid 0-6.99 base 7.01-14 neutral 7
Buffers
Help prevent large changes in ph
Energy
Any capacity to move something
Potential energy
Energy store in an object
Chemical energy
Potential energy in molecular bonds
Free energy
Potential energy available in a system to do useful work
Kinetic energy
Energy in motion
Heat
Kinetic energy of molecular motion
Chemical reaction
A process in which covalent or ionic bond is formed or broken
Chemical equation
Symbolizes course of chemical reaction
Classes of chemical reactions
Decomposition reactions and synthesis reaction
Decomposition reaction
Large molecule breaks down into two or more smaller ones
Synthesis reaction
Two or more small molecules combined to for a larger one
Reach equilibrium
When ratio of products to reactants is stable
Reactions rates increase when
The reactants are more concentrated, the temperature rises or a catalyst is present
Metabolism
All chemical reactions of the body