evidence of chemical reaction
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A chemical reaction is a process that leads to the transformation of one set of chemical substance s to another. Chemical reactions can be either spontaneous, requiring no input of energy, or non-spontaneous, often coming about only after the input of some type of energy, viz. heat, light
A chemical property is any of a material's properties that becomes evident during a chemical reaction; that is, any quality that can be established only by changing a substance's chemical identity. Simply speaking, chemical properties cannot be determined just by viewing or touching the substance; the substance's internal structure must be affected for its chemical properties to be investigated.
Chemical properties can be contrasted with physical properties, which can be discerned without changing the substance's structure. However, for many properties within the scope of physical chemistry, and other disciplines at the border of chemistry and physics, the distinction may be a matter of researcher's perspective. Material properties, both physical and chemical, can be viewed as supervenient; i.e., secondary to the underlying reality. Several layers of superveniency are possible.
Chemical properties can be used for building chemical classifications.
Examples of chemical properties
- Reactivity against other chemical substances
- Heat of combustion
- Enthalpy of formation
- Chemical stability in a given environment
- Preferred oxidation state(s)
- Coordination number
- Capability to undergo a certain set of transformations, for example molecular dissociation, chemical combination, redox reactions under certain physical conditions in the presence of another chemical substance
- Preferred types of chemical bonds to form, for example metallic, ionic, covalent
For example hydrogen has the potential to ignite and explode given the right conditions. This is a chemical property.
Metals in general do they have chemical properties of reaction with an acid. Zinc reacts with hydrochloric acid to produce hydrogen gas. This is a chemical property.
From Yahoo Answers
Answers:Usually a particular type of reaction will produce several evidences to show its complete reaction. 1. Temperature changes 2. If possible a precipitate is observe, this will only happen if the product is insoluble in the solvent 3. Effervescence can be observed in a form of bubbles or gas. 4. Colour of the reaction mixture may change
Answers:It will fizz and form bubbles
Answers:In order for most chemical reactions to occur the IONS need to react, until the water is added the substances are just compounds, after the water is added, the compounds split into their ions and readily react.
Answers:lol...i just had this experiment...anyways...KMnO4 is purple right, so when added to alkene it should change to a brownish color. That brown color is a precipate formed.