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Chemical reactions
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47
Chemistry
4th Grade
02/24/2012

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Term
What makes a mixture a solution?
Definition
A mixture is something which is not chemically bonded to another thing
Term
Heterogeneous Mixtures
Definition
Heterogeneous mixtures are made up of two or more substances that can be easily separated and identified
Term
Homogeneous Mixtures
Definition
Homogeneous mixtures are made up of two or more substances that are combined uniformly
Term
Where can solutions be found?
Definition
Solutions can be found anywhere. Some common solutions would be things like juices(heterogeneous) and salads(heterogeneous).
Term
What are the parts of a solution?
Definition
The parts of a solution are the solvent and the solute.
Term
Solvent
Definition
The liquid in which a solute is dissolved to form a solution.
Term
Solute
Definition
The smallest part in a solution, dissolved in the solvent.
Term
Acids
Definition
A chemical substance (typically, a sour-tasting liquid) that calms down alkalis, dissolves some metals, and turns litmus paper red.
Term
Bases
Definition
A compound that will react with acids to form salts,
Term
Salts
Definition
A mineral that when added to water increases the electrical conductivity of water.
Term
Compare the characteristics of Acids, Bases, and Salts.
Definition
Acids react with bases and make salts.
Term
What factors affect the rate of a reaction?
Definition
1. Concentration
2.Medium
3.Temperature
4.Presence of catalysts and competitors
Term
What makes a substance an acid
Definition
If the ph level is less than 7
Term
What makes a substance a base?
Definition
If its ph level is greater than 7.
Term
What are the four signs of a chemical reaction?
Definition
The four signs of a chemical reaction are the starting of precipitation, production of bubbles, a temperature change, and a color change.
Term
What factors affect the rate of a reaction?
Definition
1. Concentration
2.Medium
3.Temperature
4.Presence of catalysts and competitors
Term
What are the parts of a chemical equation?
Definition
Parts of a chemical equation include reactants, products, coeifficents, and subscripts.
Term
What is an ionic bond?
Definition
An ionic bond is a type of chemical bond formed through an electrostatic attraction between two oppositely charged ions.
Term
What happens to energy during a chemical reaction?
Definition
During a chemical reaction, energy gets used to break the existing bonds in order to create new bonds.
Term
Reactants
Definition
Reactants are elements or compounds that chemically interact to form a new substance.
Term
What happens to valence electrons during the bonding process
Definition
They are shared between 2 bonds
Term
Products
Definition
Products are substances that form as a result of a chemical reaction.
Term
Acid Image
Definition
[image]
Term
Salt Image
Definition
[image]
Term
Ionic Bonds
Definition
1.Have high meling points
2.Conduct electricity
3.Dissolve easily in water
4.Well defined crystals
Term
What is a covalent bond?
Definition
When one or more pairs of electrons are shared by two atoms.
Term

Reactant Image

In this case the reactant would be the clear like substance.

Definition
[image]
Term
Covalent Bonds
Definition
1.Are molecules(neutral)
2.Do not conduct electricity
3.Low and melting boiling points
4.Are less soluble in water and more soluble in non-aqueous solvents
Term
Chemical Bond
Definition
An attraction between atoms that allows the formation of chemical substances that have two or more atoms.
Term
Solute Image
Definition
[image]
Term
pH Level
Definition
pH is a measure of the acidity or basicity of a solution
Term
Precipitation
Definition
when the temperature of a solution decreases
Term
Identify when a chemical reaction takes place.
Definition
You will know that a chemical reaction has taken place if new compounds are produced.
Term
Concentration
Definition
The amount of a substance per defined space. Concentration usually is expressed in terms of mass per unit volume.
Term
Solvent Image
Definition
[image]
Term
What is a neutraliztion reaction?
Definition
A neutralization reaction is a chemical reaction in which an acid and a base interact with the formation of a salt
Term
Medium
Definition
The phase (and composition of the phase) in which chemical species and their reactions are studied in a particular investigation.
Term
Catalysts
Definition
speeds up a reaction
Term
Coeffients
Definition
1.A numerical or constant quantity placed before and multiplying the variable in an chemical expression
Term
Subscripts
Definition
A distinguishing character or symbol written directly beneath or next to and slightly below a letter or number
Term
Compound
Definition
A compound is a pure substance made up of two or more elements that are chemically combined.
Term
What is the deffinition of neutralization?
Definition
Neutralization is the reaction of an acid with a base forming the salt and water molecules.
Term
Electrostatic
Definition
Electrostatics is the branch of physics that deals with the phenomena and properties of stationary or slow-moving electric charges.
Term
Signs of a Chemical Reaction
Definition
Production of bubbles
Term
Signs of a Chemical Reaction
Definition
A temperature change
Term
Signs of a Chemical Reaction
Definition
A color change
Term
Signs of a Chemical Reaction
Definition
a color change
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