Reactions CP Flashcards
(15 cards)
examples of physical change?
cutting, coloring, crushing, melting, and boiling
examples of chemical change?
burning, rusting, decomposing
chemical reaction definition?
the processes by which chemicals interact to form new chemicals with different compositions
chemical reactions are represented by…..
equations
what/where is the reactant?
starting substances (left of the arrow)
what/where is the products?
ending substance (right of the arrow)
what/where is the coefficients?
tells the number of each substance needed. These can change (before a element)
why is it important to balance the equations?
to keep from violating the Law Of Conservation Of Mass
Law Of Conservation Of Mass definition?
matter cannot be created or destroyed, it can only change for ms *mass of reactants = mass of products
signs that a chemical change has occurred
release of light, temp change, odor change, sudden color change, gas is given off, sudden appearance of a solid
A + B —-> AB
synthesis
AB —-> A + B
decomposition
AB + 2C —-> AC + BC
combustion
A + BC —-> B + AC
single replacement (SSR)
AB + CD —-> AD + BC
double replacement (DDR)
