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CHM101 CHAPTERS 4-6 EXAM highlights
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CHM101 CHAPTERS 4-6 EXAM highlightsEvidence of a chemical reaction includes - ANSWER look for evidence of a new substance
visual clues (permanent)
color change
precipitate formation
solid that forms when liquid solutions are mixed
gas bubbles
large energy changes
What are chemical equations and how are they used to show chemical reactions? - ANSWER
.Shorthand way of describing a reaction
Provides information about the reaction
Formulas of reactants and products
States of reactants and products
Relative numbers of reactant and product molecules that are required
Can be used to determine weights of reactants used and products that can be made
Chemical formulas provide the identities of the reactants and products involved in the chemical
change, allowing classification of the reaction. Coefficients provide the relative numbers of these
chemical species which allows the chemist to assess the relationships between the reactants and
the products in a reaction and determine the quantities of these
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