Those Changes
A characteristic that can be observed without altering the chemical composition of a substance.
What is it's physical property
The process where some forms of matter that passes directly from a solid to become a gas. Iodine crystals do this when they are heated.
What is sublimation?
Where one water molecule is attracted to another molecule.
What is the intermolecular force?
An ionic compound that does not have H+ or OH- as one of it's ions.
What is a salt?
A substance that speeds up chemical a reaction yet appears in unchanged from among the products of the reaction.
What is a catalyst?
A characteristic that can be observed when the substance is interacting with other forms of matter.
What is a chemical property?
Properties of this state of matter are: compressibility, expansivity, and diffusibility.
What is a gas?
This is the transition from a liquid to a gas
What is evaporation?
A substance that donates a pair of electrons, or yields hydroxide ions in an aqueous state.
What is a base?
The diffusion of water molecules across a semipermeable membrane that selectively prevents the passage of solute molecules, but is permeable to water.
What is Osmosis?
The change that occurs when ice melts.
What is an example of a physical change?
When an odor of a chemical like ammonia of formaldehyde is able to be detected throughout a room
What is diffusibility?
373 degrees Kelvin
What is the boiling point of water?
This substance accepts a pair of electrons and yields hydrogen is a water solution.
What is an acid?
A class of organic compounds formed by the oxidation of a secondary alcohol
What is a Ketone?
Examples are the rusting of iron.
What is an example of a chemical change?
This equals the pressure of 1 atmosphere.
What is 760 mm Hg (of mercery) or 760 torr?
The movement of molecules in solution from one area of greater concentration to an area of lesser concentration until a uniform concentration is reached.
What is diffusion
This bond involves the sharing of electron pairs between atoms.
What is a covalent bond?
An atom of an element having the same atomic number but different number of neutrons.
What is an allotrope?
A compound consisting of only two elements, one of which is oxygen.
What is an oxide?
The volume of a gas may be decreased by this.
What is compression?
The molecular cohesion at the surface of a liquid forming a membrane-like layer.
What is Surface Tension?
A positively charged ion.
What is a cation?
Capable of maintaining a constant pH by neutralizing small amounts of added acid or base.
What is a buffer?