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Related Concept Videos

Introduction to Chemical Reactions01:23

Introduction to Chemical Reactions

14.7K
All chemical reactions begin with a reactant, the general term for one or more substances entering the reaction. Sodium and chloride ions, for example, are the reactants in the production of table salt. One or more substances produced by a chemical reaction are called the product. Chemical reactions follow the law of conservation of mass, which means that matter cannot be created nor destroyed in a chemical reaction. The components of the reactants—the number of atoms and the...
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Chemical Reactions01:19

Chemical Reactions

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A chemical reaction is a process by which the bonds in the atoms of substances are rearranged to generate new substances. Matter cannot be created or destroyed in a chemical reaction—the same type and number of atoms that make up the reactants are still present in the products. Merely, the rearrangement of chemical bonds produces new compounds.
Chemical Reactions Rearrange Atoms into New Substances
A chemical reaction takes starting materials—the reactants—and changes them...
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Chemical Reactions02:26

Chemical Reactions

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A balanced chemical equation provides the information of chemical formulas of the reactants and products involved in the chemical change. A reaction’s stoichiometry helps predict how much of the reactant is needed to produce the desired amount of product, or in some cases, how much product will be formed from a specific amount of the reactant.
The relative amounts of reactants and products represented in a balanced chemical equation are often referred to as stoichiometric amounts. However, in...
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Predicting Reaction Outcomes02:24

Predicting Reaction Outcomes

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Kinetics describes the rate and path by which a reaction occurs. In contrast, thermodynamics deals with state functions and describes the properties, behavior, and components of a system. It is not concerned with the path taken by the process and cannot address the rate at which a reaction occurs. Although it does provide information about what can happen during a reaction process, it does not describe the detailed steps of what appears on an atomic or a molecular level. On the other hand,...
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Limiting Reactant02:27

Limiting Reactant

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The relative amounts of reactants and products represented in a balanced chemical equation are often referred to as stoichiometric amounts. However, in reality, the reactants are not always present in the stoichiometric amounts indicated by the balanced equation.
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Chemical Equations03:10

Chemical Equations

85.0K
Chemical equations represent the identities and relative quantities of substances involved in a chemical reaction. The substances undergoing reaction are called reactants, and their formulas are placed on the left side of the equation. The substances generated by the reaction are called products, and their formulas are placed on the right side of the equation. Plus signs (+) separate individual reactant and product formulas, and an arrow (→) separates the reactant and product (left and right)...
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Author Spotlight: Exploring Light-Driven Chemical Reactions and Energy-Harnessing Devices in Photochemical Research
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Light: A Very Peculiar Reactant and Product.

Vincenzo Balzani1, Giacomo Bergamini2, Paola Ceroni2

  • 1Dipartimento di Chimica "G. Ciamician", Università di Bologna via Selmi 2, 40126 Bologna (Italy). vincenzo.balzani@unibo.it.

Angewandte Chemie (International Ed. in English)
|September 3, 2015
PubMed
Summary

Light energy and information transfer are fundamental in chemistry. Scientists are developing systems to convert light energy into chemical or electrical energy for a sustainable future.

Keywords:
catalysisluminescencephotochemistryphotosensitizerssolar energy conversion

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Area of Science:

  • Photochemistry and sustainable energy solutions.

Background:

  • Light is the fastest medium for energy and information transfer.
  • In chemical reactions, light can act as both a reactant and a product.
  • Sunlight is a crucial and abundant energy source.

Purpose of the Study:

  • To explore the dual role of light in chemical processes.
  • To highlight the significance of sunlight as an ultimate energy source.
  • To present the ongoing efforts in designing light-conversion systems for sustainability.

Main Methods:

  • Investigating the fundamental principles of light-matter interactions in chemistry.
  • Designing novel systems for light energy conversion.
  • Analyzing the efficiency of converting light into electrical or chemical energy.

Main Results:

  • Light's capability to act as both reactant and product is confirmed.
  • Sunlight's potential as a primary energy source is emphasized.
  • Progress in developing systems for light energy conversion is demonstrated.

Conclusions:

  • Harnessing light energy is key to sustainable practices.
  • Chemical systems are being engineered for efficient light energy conversion.
  • Further research aims to optimize light-based energy solutions.