Chemistry Balancing Equations

an expression using symbols to represent a chem- reaction

chemical equation

located on the right hand side of a chem- reaction

products

starting substances located on the left hand side of a chem- reaction

reactants

what sign is used to separate reactants from product

arrow

what does aq mean

aqueous solution - dissolved in water

what does s stand for

solid

what does a down arrow stand for

precipitate

what does a up arrow stand for

evolution of gas

what is a aqueous solution

solvent is water

what is a precipitate

solid that forms from a solution during a chem- reaction

in order for combustion to occur, what reactant must be present

oxygen

if a chem- equation has copper on the reactants side must copper also be somewhere on the products side

yes

what uses an electrical current to decompose compounds

Electrolysis

what are the products for a complete combustion reaction

CO2and H2O

4 factors that affect the rate of a reaction

temp, catalyst, surface area, concentration

substance that speeds up a chem- reaction

catalyst

biological catalysts that aid in digestion

enzyme

energy required to start a chem- reaction

activation energy

Cu(NO3)3

Compound

Si

element

N2

diatomic molecule

Diatomic Molecules

H2 N2 O2 F2 Cl2 Br2 I2