how to analyze melting point
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- identify: results don't confirm but can be consistent w hypothesis
- purity: sharpness of melting point range indicates PURITY of compound
basics of acid-base titrations
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1 substance (base) of a known conc. is reacted w another substance (acid)
in a solution of unknown conc --> titration complete at equiv point when
the # of moles of OH- added = # of moles of H+ originally present in
solution
melting point are used to...
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- identify compounds
- establish purity (purer sample, higher the m.p.)
- analyze it
mixed melting point
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- used to determine identity of compound
1. have unknown compound that melts at 120-121 C, what's the unknown?
2. mix unknown compound w urea and measure melting point
2. if melting point is still 120 C, the unknown compound is urea
3. if melting point lower or broader, its not urea
acid-base equilibria
Give this one a try later!
Give this one a try later!
- identify: results don't confirm but can be consistent w hypothesis
- purity: sharpness of melting point range indicates PURITY of compound
basics of acid-base titrations
, Give this one a try later!
1 substance (base) of a known conc. is reacted w another substance (acid)
in a solution of unknown conc --> titration complete at equiv point when
the # of moles of OH- added = # of moles of H+ originally present in
solution
melting point are used to...
Give this one a try later!
- identify compounds
- establish purity (purer sample, higher the m.p.)
- analyze it
mixed melting point
Give this one a try later!
- used to determine identity of compound
1. have unknown compound that melts at 120-121 C, what's the unknown?
2. mix unknown compound w urea and measure melting point
2. if melting point is still 120 C, the unknown compound is urea
3. if melting point lower or broader, its not urea
acid-base equilibria
Give this one a try later!
