experimental technique and chemical analysis Flashcards
physical changes
changes affecting the form of a substance, but not its chemical composition
chemical changes
a change in a substance’s composition that results in the formation of a new substance.
how to identify chemical changes
-flammable
-radioactive
-toxic
-PH
how to identify physical changes
-melting
-hardness
-ductile
-malleable
stopwatch
to monitor the timing of chemical reactions
thermometer
to check the temperature of a reaction
balance
a equipment used to measure the weight of a substance or object
A burette
A burette is a laboratory tool used to measure the volume of liquids or gases
volumetric pipette
used to measure and transfer a specific volume of liquid
measuring cylinders
a cylinder used to measure the volume of liquids
gas syringe
a equipment to measure the volume of a gas or collect a gas
solvent
a substance that dissolves a solute
solute
a substance that is dissolved in a solvent
solution
a mixture of one or more solute dissolved in a solvent
saturated solution
a solution that contain the maximum amount of solute that is capable of dissolving
unsaturated solution
a solution that contains less solute than the maximum amount that can be dissolved in the solvent
simple distilation
seperating out a liquid from a solution
fractional distillation
seperating mixtures of liquids
filtration
to seperate insoluble solids from liqUids
residue
the solid left on the filter paper
paper chromatography
a technique used to separate and analyze a mixture
rf value
The ratio of the solute’s distance travelled to the solvent distance travelled
pure substance
an element or compound made up of one type of particle
impure substance
a mixture of two or more elements or compounds that are not chemically bonded together
titration
a laboratory technique that determines the concentration of an unknown solution by adding a known amount of another solution to it
