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Water, Matter & pH

Unit 2: The Chemistry of Life

TermDefinition
Polar When electrons are not shared equally between two atoms, some atoms have a slight positive charge and some atoms have a slight negative charge
Adhesion A property of water that refers to water's ability to stick to other substances.
Cohesion A property of water that refers to water's ability stick to itself.
Covalent Bond A bond between two atoms in which electrons are shared. A covalent bond can either be polar or nonpolar.
Ionic Bond A bond created by the attraction between a positive and negative ion.
Electron The negatively charged part(s) of an atom located on the outside of the atom.
Neutron The part of an atom with no charge (neutral). The neutron(s) are located in the middle of an atom.
Proton The positively charged part(s) of an atom located in the middle of the atom.
Universal Solvent A substance that is really good at dissolving a variety of other substances. Water is considered the universal solvent.
Base A substance that has a pH greater than 7 on the pH scale.
Alkaline A substance that has a pH greater than 7 on the pH scale.
Acid A substance with a pH less than 7
pH Scale A measure of how acidic or basic a substance is. The pH scale goes from 0 - 14. A pH of 7 is neutral. A pH less than 7 is acidic. A pH greater than 7 is basic.
Hydrogen Bond A weak bond that holds one water molecule to another water molecule.
Surface Tension the tendency for water molecules to stick together when at the boundary of a gas and a liquid
Capillary Action A property of water that refers to water's ability to move up a thin tube (like a plant stem) because of cohesion and adhesion
Neutral A substance with a pH of 7 is neutral. Water is the only substance with a truly neutral pH.
Created by: Biomonsters
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