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Chemical Reactions:)

chemical reactions info

QuestionAnswer
Physical Change: affectsonly the physical properties or characteristics...does not change chemical identity
Chemical Change: affects chemical structure and composition...identity is changed and properties change
Chemical reaction: the process through which a chemical change occurs
What are the evidences that a chemical reaction occured? production of gas(bubbles), change in color or odor, formation of a percipitate(a solid that is formed when 2 liquids are mixed), absorbtion/release of heat/light, permanet change in identity.
How many evidences are there? 5
coefficient? balance out matter in a reaction
reactants? what is used or what is at the start of a chemical reaction
products? what is made during/after a chemical reaction
subscripts? show the ratio of elements in a compound
Synthesis Reaction: When many reactants create 1 procuct
Decomposition Reaction: reaction in which 1 reactant makes many productEx.: H2Co3 -> H2O + CO
double replacement reaction: reaction where 2 elements (or ions) in 2 different compounds switch placesNaCl + AgF -> NaF + AgCl
single replacement reaction: reaction where one element from one compound switches places with one element from another compound.Zn + 2HCl -> ZnCl2 + H2
Endothermic reactions: chemical reactions where energy is absorbed.heat + 6Co2 + 6H2O -> C2H12O6 + 6O2
Exothermic reaction: energy is released2Al + Fe2O3 -> Al2O3 + 2Fe + heat
reactivity: how easily an atom reacts with others
Action activity: minimum amount of energy needed to start a chemical reaction
Reaction Rate: how fast a reaction occurs...can be affected by 2 things:Catalysts and Inhibitors
Catalysts: speed up reactions but are not used up in the reaction
Inhibitors: slow a reaction down
Created by: hannahcoffman
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