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Chemical Compounds
Acids, Bases, Organic Compounds
47
Chemistry
8th Grade
01/25/2012

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Term
Chemical Bond
Definition
An interaction that holds atoms and ions together.
Term
Ionic Compound
Definition
Compounds that have Ionic Bonds.
Term
Ionic Bond
Definition
Bond formed by the attraction between oppositely changed ions. (positive and negative ions attract)
Forms when valence electrons are transferred from one atom to another atom.
Term
Ion
Definition
Charged particles that form when atoms gain or lose electrons.
Term
Crystal Lattice
Definition
Repeating three-dimensional pattern that forms in ionic compounds. Responsible for ionic compounds being brittle.
Term
Solubility
Definition
The ability of one substance to dissolve in another at a given temperature.
Term
Covalent Compound
Definition
Compounds that form when atoms share electrons.
Term
Acid
Definition
Any compound that increases the number of hydronium ions when dissolved in water.
Term
Base
Definition
Any compound that increases the number of hydroxide ions when dissolved in water.
Term
Indicator
Definition
A substance that changes color in the presence of an acid or a base.
Term
Strong acid
Definition
ALL of the molecules of this type of acid break apart and form hydrogen ions (H+) when dissolved in water.
Term
Weak Acid
Definition
Only a FEW molecules of this type of acid break apart and form hydrogen ions (H+) when dissolved in water.
Term
Strong Base
Definition
ALL of the molecules of this type of base break apart and form hydroxide ions (OH-) when dissolved in water.
Term
Weak Base
Definition
Only a FEW of the molecules of this type of base break apart and form hydroxide ions (OH-) when dissolved in water.
Term
pH Scale
Definition
A measure of the hydronium ion concentration in a solution. Used to measure how acidic or how basic a solution is.
Term
Neutralization Reaction
Definition
The reaction between acids and bases.
Term
Salt
Definition
An ionic compound formed from the positive ion of a base and the negative ion of an acid.
One product of a neutralization reaction.
Term
Organic Compounds
Definition
Compounds that contain carbon.
Term
Single Bond
Definition
A covalent bond made on only ONE pair of shared electrons.
Term
Double Bond
Definition
A covalent bond made by two pairs of shared electrons.
Term
Triple Bond
Definition
A covalent bond made by three pairs of shared electrons.
Term
Valence Electron
Definition
An electron in the outermost energy level of an atom.
Term
Carbohydrate
Definition
Biochemical that is a polymer composed of sugar molecules bonded together.
Term
Lipid
Definition
Fat molecule or a molecule that has similar properties. Does not dissolve in water.
Term
Protein
Definition
A polymer that is made up of amino acids.
Term
Nucleic Acid
Definition
A polymer that is made up of subunits called nucleotides.
Term
Amino Acid
Definition
The molecules that are the "building-blocks" of proteins.
Term
Polymer
Definition
A molecule formed by a chain of repeating units.
Ex: Protein molecule
Term
What are four properties of ionic compounds?
Definition
They are brittle, they have high melting points, many of them are highly soluble, and they are often good conductors of electricity when in solution.
Term
What are three properties of covalent compounds?
Definition
They often are not soluble in water, they have low melting points, and they often do not conduct electricity when in solution.
Term
List four properties of acids
Definition
They have a sour flavor, They change blue litmus paper to red, they react with metals, and they can conduct electric current.
Term
List four properties of bases
Definition
They have a bitter taste, they feel slippery, they change red litmus paper to blue, they conduct electric current.
Term
What are the two products of a neutralization reaction?
Definition
A salt and water
Term
What is the pH of an acidic solution?
Definition
Below 7
Term
What is the pH of pure water?
Definition
7 (neutral)
Term
What is the pH of a base?
Definition
Above 7
Term
What are the three types of Carbon Backbones?
Definition
Straight chain, Branched chair, and Ring
Term
What are the three types of bonds that can form between carbon atoms>
Definition
Single bond, Double bond, Triple bond
Term
What are the six elements that molecules in living things are mostly made up of?
Definition
Carbon, hydrogen, oxygen, nitrogen, sulfer, and phosphorus
Term
What do carbohydrates do for living things?
Definition
This biochemical is used by living things as a source of energy.
Term
What are two examples of lipids?
Definition
Waxes, oils, steroids, or phospholipids
Term
How many different amino acids are there?
Definition
20
Term
What do the structures of proteins and carbohydrates have in common?
Definition
Both molecules are long-chain polymers.
Term
What are two examples of nucleic acids?
Definition
DNA and RNA
Term
What is the name of the "building block" of nucleic acids?
Definition
Nucleotides
Term
What are three functions of water in living things?
Definition
Temperature regulation
Transports substances
Provides lubrication
Term
What is one important function of salt in the human body?
Definition
It helps to conduct nerve impulses (electrical signals) in the body.
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