The exact relationship between reaction rate and concentration depends on the reaction "mechanism". This is the process involving elementary reaction steps.
http://www.chem.uic.edu/marek/apintropage/ap_notes/chapter18/rateseffectstempconcats.htm

At this point, we have only observed the dependence of reaction rates on concentration of reactants and on temperature, and we have fit these data to equations called rate laws.
http://cnx.org/content/m12728/latest

Speed at which a chemical reaction proceeds. It is usually expressed in terms of the concentration (usually in moles per litre) of a reactant consumed, or product formed, in unit ...
http://encyclopedia.farlex.com/Rate+of+reaction

In this case the doubling of the initial concentration of A has No EFFECT on the reaction rate so the reaction must be Zeroth Order in A. Thus the rate law for the reaction is
http://itl.chem.ufl.edu/2045/lectures/lec_l.html

The order of a reaction is the sum of concentration exponents in the rate law for the reaction. For example, a reaction with rate law d[C]/dt = k[A] 2 [B] would be a third order ...
http://antoine.frostburg.edu/chem/senese/101/kinetics/glossary.shtml

Determining the Initial Rate from a Plot of Concentration Versus Time. The initial rate of a reaction is the instantaneous rate at the start of the reaction (i.e., when t = 0).
http://www.chem.purdue.edu/gchelp/howtosolveit/Kinetics/CalculatingRates.html

GCSE Chemistry Rates of Reaction - Acid Concentration Coursework. HCL, MG, H2S04, Magnesium and Hydrogen Chloride Experiments
http://www.courseworkbank.co.uk/GCSE/Chemistry_Coursework/Rates_Of_Reaction/Acid_Concentration/

Reaction Kinetics in Gases. The applet below compares the initial rate of reaction for molecules in the gas phase. The temperature, activation energy and starting concentration of ...
http://chem.salve.edu/chemistry/kinetics.asp

It will be the product of the rate constant for the reaction times the concentration of the reagent that is present in excess. In our discussion of acid-base equilibria, we argued ...
http://chemed.chem.purdue.edu/genchem/topicreview/bp/ch22/react.html

A working definition of reaction rate as a change in concentration divided by time or as a function of time is necessary. Students must be familiar with the dilution of solutions.
http://www.usoe.k12.ut.us/curr/science/core/plans/rate2.html

PURPOSE The purpose of this experiment is to determine the effect of changing the concentration of a reactant upon the rate of a reaction. DESCRIPTION
http://www.woodrow.org/teachers/ci/1986/exp19.html

Consider a reaction of Butyl chloride in water to form butyl alchohol: C 4 H 9 Cl + H 2 O -> C 4 H 9 OH + HCl Careful measurement of the concentration of the reacting butyl ...
http://itl.chem.ufl.edu/4411/2041/lec_k.html

Objective: Quantify factors which control the rate of chemical reactions (e.g. temperature, pH, concentration, catalysts) and determine their effects.
http://www.usoe.k12.ut.us/curr/science/core/plans/rate.html

By similar reasoning, we can conclude that because the rate of reaction doubled when the concentration of acetone was doubled (cf. experiments 1 and 3) the reaction must be first ...
http://www.sparknotes.com/chemistry/kinetics/ratelaws/section2.rhtml

To determine the affect on rate of reaction of increasing the concentration of reagent. Method Wear goggles. Cut a strip of Magnesium ribbon 2cm long.
http://pulse.pharmacy.arizona.edu/11th_grade/industrialization/chemistry/rate_of_reaction.html

Speed at which a chemical reaction proceeds. It is usually expressed in terms of the concentration (usually in moles per litre) of a reactant consumed, or product formed, in unit ...
http://encyclopedia.farlex.com/Reaction+rate

An introduction to order of reaction and rate equations ... Changing the concentration of substances taking part in a reaction usually changes the rate of the reaction.
http://www.chemguide.co.uk/physical/basicrates/orders.html

The exact relationship between reaction rate and concentration depends on the reaction "mechanism". This is the process involving elementary reaction steps
http://www.800mainstreet.com/7/0007-005-rea-t-cat.html

The decomposition of N 2 O 5 is a first-order reaction because the rate of reaction depends on the concentration of N 2 O 5 raised to the first power.
http://chemed.chem.purdue.edu/genchem/topicreview/bp/ch22/rateframe.html

Introducing Chemical Kinetics - Rate Equations. By rate of reaction we mean the change in concentration of a reactant (or a product) in a given period of time.
http://www.avogadro.co.uk/kinetics/rate_equation.htm

The k(T) is the reaction rate coefficient or rate constant, although it is not really a constant, as it includes everything that affects reaction rate outside concentration such as ...
http://en.wikipedia.org/wiki/Rate_equation

The rate law is an equation that relates the rate of a reaction to the concentration of reactants raised to various powers. For the reaction above both reactant concentrations have ...
http://www.newi.ac.uk/buckleyc/react.htm

Biology/Chemistry. Reaction Rates - Catalysis, Concentration, Surface Area, and Temperature
http://www.iit.edu/%7Esmile/cb1498.htm

CAcT HomePage Concentration and Chemical Reaction Rate Skills to develop; Explain chemical reaction rates; Explain the concentration effects on reaction rate
http://www.science.uwaterloo.ca/%7Ecchieh/cact/c123/coneffec.html

Chemical Kinetics Rate of Reaction Concepts. In the previous exercise the concentration-time plots showed that each species in the reaction has its own rate of change in its ...
http://www.chm.davidson.edu/ChemistryApplets/kinetics/RateOfReaction.html

If you are planning an investigation, I suggest that you investigate the effects of temperature or the effects of the concentration of the reactants because these ...
http://www.purchon.com/chemistry/rates.htm

Describes and explains the effect of changing the concentration of a liquid or gas on how fast reactions take place.
http://www.chemguide.co.uk/physical/basicrates/concentration.html

Chemical Kinetics Reaction Rates Part 1. Concentration Changes. Chemical kinetics is the study of the speed with which a chemical reaction occurs and the factors that affect this ...
http://www.chm.davidson.edu/ChemistryApplets/kinetics/ReactionRates.html