chemical reactions basics

chemical reaction

process by which 1 or more substances are changed into 1 or more different substances

evidence of chemical reactions

unexpected color change, formation of rust, production of bubbles/gas, formation of a precipitate

reactants

the first part of a chemical reaction equation

yields

the arrow pointing to the products

products 

the result of the reactants (on the right side of the equation)

precipitate

an insoluble solid

states of matter (g)

gas

states of matter (l)

liquid

states of matter (aq)

aqueous solution

states of matter (s)

solid

coefficients

used to balance out the equation

catalyst

speeds up the reaction without reacting

inhibitor

slows down the reaction

delta

reactants are heated

endothermic

reaction requires/absorbs heat

exothermic

reaction releases heat

diatomic elements

(cannot exist alone) Br I N Cl H O F