Chapter 14: Experimental Chemistry

does not involve number

involves numbers

measure value vs. true value

closeness of repeated measurements

precision of a measured number

uncertainty of last digit of measurement

absolute uncertainty divided by number itself

determined by experimenter

measured property of the independent variable

“to deliver”, most accurate for pouring

“to contain”, should not be used for pouring, only holding

part of buret that controls flow of water

determines liquid density

q = (mass)(specific heat)(temperature change)

sudden, violent burst of boiling

used for obtaining specific volume of molar concentration

collect gasses formed in a reaction

used to collect larger solids from a liquid

used to collect small solids from a liquid

clear liquid from a centrifuge

separates liquids with two different boiling points

used to find specific pH

determines if solution is acidic or basic

measures amount of light that a colored solution absorbs

A = abc