handwriting and chromatography Flashcards
how does a magnifying glass make things look bigger
bends light rays (refraction)
indicators in comparing handwriting sample
Spacing, slant and direction of letters and words
Pressure on the page
formation of loops in letters
dotting of the letter ‘I and J’
crossing of the letter ‘t’
cursive
irrelevant marks on the page
Writing tools used
chromatography
process for separating components of a mixture
solvent
substance that componets are dissolved into
examples of solvents
alcohol and water
The particles of solute will be separated according to
size
as they are carried up the paper;
what particles travel faster and end up at the top
smaller particles
what particles travel slower and end up at the bottom
larger particles
The pattern on the chromatography paper is called
a
chromatograph
what is a chromatograph used for
separate and identify substances in police work.
what is identified in urine and blood samples often with of chromotogprahy
Drugs ranging from narcotics to
aspirin,
properties of substances
pH
solubility
appearance,
reaction to water/ acids
The solvent travels up the paper by
capilary aciton
The
particles of solute that are dissolved in the solvent are
carried up the paper along with the solvent.
if a substance becomes bright pink when phenolphthalein is added, what does this indicate about the substance
its an alkali
