CHM2045L UF Final Exam

red safety square

flammable

blue safety square

poison

yellow safety square

reactivity (potential to explode)

white safety square

special

mass % of SOLUTE =

(mass solute)/(mass solution)100 or (mass solute)/(mass solute + solvent)100

mass % of water

(mass water lost)/(mass of hydrate)*100

empirical formula of hydrate

(moles water)/(moles anhydrous salt)

flame temperature can be adjusted by

adjusting gas flow on natural valve AND adjusting metal collar on the burner

titrant

substance added to analyze (usually has known concentration)

analyzer

substance of unknown concentration

equivalence point

titrant and analyze have equivalent stoichiometric ratio

x-axis of titration curve

volume of titrant added

y-axis of titration curve

pH of analyte solution

where is the equivalence point on a titration curve?

at the steepest point of the curve

ORP sensor

measures potential during titration, Oxidation Reduction Potential sensor

titration point on second derivative curve

where y = 0 (slope crosses x-axis)

barometer

measures atmospheric pressure

manometer

measures the pressure of a gas in a container

pressure of fluid in upside down graduated cylinder (in Pa)

p(fluid) = heightdensitygravity

is magnesium flammable

yeah

does magnesium react with water and acid solutions

yup

is HCl flammable

naur

symbol: exploding bomb

explosive

symbol: flame

flammable

Symbol: Flame over circle

oxidising

symbol: corrosion

corrosive

symbol: skull and crossbones

acute toxicity

symbol: environment

hazard to environment

symbol: exclamation mark

health hazard/irritant

symbol: health hazard (star in person)

hazard to health

symbol: gas cylinder

gas under pressure

accuracy

a description of how close a measurement is to the true value of the quantity measured.

precision

a measure of how close a series of measurements are to one another

Beer's law

explains the relationship between absorbance, at a given wavelength and concentration, A = εbc

calibration curve x-axis

solute concentration

calibration curve y-axis

absorbance

slope of calibration curve

ε