The result of a chemical change is the permanent loss of the reactants in the production of an entirely new substance. You could have selected any three types of chemical changes from these: synthesis or combination, decomposition, single-replacement, double-replacement, combustion, neutralization, precipitation, or redox.ĭid you name any four characteristics of a chemical change from the list of seven? Production of gas not present in the reactants permanent color change change in temperature production of heat, light, or sound change in odor or taste production of a precipitate change in density.
Name four characteristics of a chemical change.Ĭhemistry is challenging material, but please try your best before you peek at the answers below.ĭecomposition is a chemical change in which one pure substance breaks down into two or more pure substances (elements or compounds). Is decomposition a chemical or physical change? See how well you understand chemical changes by tackling these questions. No matter what you try, you cannot recover the paper and the writing.įor example, an explosion is a combustion reaction that will produce heat, light, sound, gas, a change in color, and a temperature change. You cannot get back the original paper because you destroyed the paper itself. You can do a lot of physical and chemical things to a sheet of paper.īurning the unwanted paper is an example of a chemical change. What can you do? Burn it, cut it up, fold it into a paper airplane? Imagine that you receive an unwelcome note on a scrap of paper from a classmate. Chemical changes can occur slowly, as with iron rusting into iron oxide or your body growing from a baby to an adult. Types of chemical changes - neutralizationĬhemical changes can occur quickly, as with combustion.
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