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 Science Education: Essentials of General Chemistry

Determining Rate Laws and the Order of Reaction

JoVE Science Education

Source: Laboratory of Dr. Neal Abrams — SUNY College of Environmental Science and Forestry

All chemical reactions have a specific rate defining the progress of reactants going to products. This rate can be influenced by temperature, concentration, and the physical properties of the reactants. The rate also includes the intermediates and transition states that are formed but are neither the reactant nor the product. The rate law defines the role of each reactant in a reaction and can be used to mathematically model the time required for a reaction to proceed. The general form of a rate equation is shown below:     where A and B are concentrations of different molecular species, m and n are reaction orders, and k is the rate constant. The rate of nearly every reaction changes over time as reactants are depleted, making effective collisions less likely to occur. The rate constant, however, is fixed for any single reaction at a given temperature. The reaction order illustrates the number of molecular species involved in a reaction. It is very important to know the rate law, including rate constant and reaction order, which can only be deter

 JoVE Chemistry

Synthesis, Cellular Delivery and In vivo Application of Dendrimer-based pH Sensors

1Institute for Complex Molecular Systems & Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology & NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR, 2NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR & IIT@NEST, Center for Nanotechnology Innovation, 3NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR, 4IIT@NEST, Center for Nanotechnology Innovation


JoVE 50545

 JoVE In-Press

Application of Genetically Encoded Fluorescent Nitric Oxide (NO•) Probes, the GeNOps, for Real-time Imaging of NO• Signals in Single Cells

1Institute of Molecular Biology and Biochemistry, Medical University of Graz

Video Coming Soon

JoVE 55486

 JoVE Neuroscience

Imaging Membrane Potential with Two Types of Genetically Encoded Fluorescent Voltage Sensors

1Department of Transdisciplinary Studies, Graduate School of Convergence Science and Technology, Seoul National University, 2Center for Functional Connectomics, Korea Institute of Science and Technology, 3College of Life Sciences and Biotechnology, Korea University, 4Advanced Institutes of Convergence Technology


JoVE 53566

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