Balancing Chemical Reactions

chemical reaction

conversion of one substance or set of substances into another

reactant

any substance started with

product

new substances formed during the course of the reaction

how can products differ

from reactants only in the arrangement of their component atoms

what 6 things indicate a chemical reaction

CLHSSG (Come Look Have Some Sour Gummies)

Color change

Light

Heat

Smoke

Solid formation

Gas

one molecule of H2 and one molecule of I2 will react to form what

2 molecules of HI

one mole of h2 and one mole of I2 will react to form what

2 moles of HI

What is essential if we want to study chemical reactions

a properly balanced chemical equation

what 3 things are included in balancing chemical equations

the elements and compounds that are mixed, the elements and compounds produced, and the physical states

what are coefficients used for

to balance the number of each atom type

What is the 1st step of balancing chemical equations

translate from words to a skeletal equation

What is the 2nd step of balancing chemical equations

place coefficients to balance atoms; start with “handles” first ( atoms that appear in one reactant and one product)

What is the 3rd step of balancing chemical equations

eliminate fractional coefficients

What is the 4th step of balancing chemical equations

count atoms on reactant and product sides: ask is mass conserved?

What is the 5th step of balancing chemical equations

add physical states for all substances

What are the 4 types of chemical reactions

synthesis

decomposition

single replacement

double replacement

give an example of synthesis

two or more elements or simple compounds combine to form a single, more complex compound

give an example of decomposition

single compound breaks apart into two or more different substances

give an example of single replacement

one element swaps with another in a compound to form a new element and a new compound

give an example of double replacement

two ionic compounds swap to form two new compounds

What can be related to one another with a balanced chemical equation

reactant and product molar amounts

What can be determined with a balanced chemical equation

the molar amount of one reactant required to consume another reactant

what can be calculated with a balanced chemical equation

the molar amount of a product that can be formed from a certain amount of a reactant