| week of |
Tuesday |
Thursday |
| Mar.29 |
reactants combine to form products ... notation
synthesis cv decomposition ... single & double replacement, combustion
balance a reaction ... # each atom before = # after ... smallest integers !
decompose a compound into its elements
each element is conserved (same # both sides)
. . . mass "loss" ↠ % product extracted
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single species replacement
... which will replace which? eXothermic
electrically polar regions on molecules (electronegativity)
atoms' attraction reducing their electrical PE
double replacement (trade places)
... why don't they trade back? eNdothermic
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| Apr.05 |
react elements to synthesize a compound
. . . "limiting reagent" and % yield computation
2 electrons reduce Cu+2 ion to Cu(0) metal plate
. . . (SO4)−2 oxidized yielding 2 e−2
measuring various "cell voltages"
=> "electron affinity" (not electronegativity)
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Quiz 7
vitamine C tablet dissolved → acid solution
NaOH until neutralized ("pH indicator" changes color)
mL OH × mmol/mL = mmol H ... acid × mg/mmol => mg vit.C
pH measurement for household materials
pH as "# places H diluted" ... pOH as "# places OH diluted"
.001 acid has pH 3 (pOH=11) ; dilute/1000 → pH 6 (pOH=8)
.0001 base = pOH 4 (pH=10) , dilute/100 → pOH 6 (pH=8)
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| Apr.12 |
"reaction process" Energy graphs for eXothermic process
"activation energy" reduces spontaneous reactions
Thermal Energy driving eNdo reaction
H− concentration driving Mn reduction
catalyst reduces activation energy "hump"
=> increase reaction rate
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Energy vs. reaction process for eNdothermic reactions
... needs "activation hump" to not spontaneously reverse
catalytic surface behavior
volcanoes
Quiz 7
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| Apr.19 |
carbon always forms 4 bonds
alkane, elkene, alkyne hydrocarbon chains ... see ball&stick cartoons
count C's as "meth-, eth-, prop-, but-, pent- ..."
... count double-bonds (or triple) as "mono, di, tri, ..."
how many different places for these bonds? "isomers"
cyclic hydrocarbons ... print organic names sheet
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alkahol carbohydrate chains
ethers ( see organic group structures & names )
aldehydes and carboxylic acids, ketones and esters
amines & ring amines
sugars: mono-saccharides and di-saccharides, oils & fats ; proteins
Quiz 9
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| Apr.26 |
Tue.Apr.27 8:00 am !
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Unit 3 Exam
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other classes
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