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hydrogen ion concentration of solutions
title for exp 3
4, HCI,NaOH 1-0.1, 2-0.01, 3-0.001, 4-0.0001
in exp 3 part 1 and 2: how many vials did u prepare and regeant, and label them
5ml, 0.5ml, 4.5 ml
how many ml did u pipette for the first part of exp 3, how many ml did u pipette out and how many ml of water did u dilute
M1V1=M2V2
formula for calculating the concentration
PH=-log(H+)
formula for calculating PH level
pOH=-log(OH-)
formula for calculating pOH
acidity, base
pH of less than 7 indicate— , whereas a pH of greater than 7 indicates —
10ml
how many ml of the unknown sol for exp 3 did u get a sample from the teacher
methyl orange
what substance did u drop in exp 3 if the unknown substance was acidic
alizarin yellow
what substance did u drop in exp 3 if the unknown substance was basic
crystallization, extraction, sublimation
what are the 3 purification techniques in exp 4
crystallization
most practical method for purification
extraction
remove a solute from a solvent when distillation is undesirable
dissolve solute more than A, immiscible with A
in extraction, 2nd solvent B must
separatory funnel
what is the material used in extraction
chcl3, ethyl ether, c6h6, ccl4, cs2
5 suitable liquids used for extraction
sublimation
transfer solid to gas, gas to solid w/out liquid state
the separation and purification of organic compounds
exp 4 title
5g acetanilide, 150 ml water, 2 drops congo red, 1g animal charcoal
in recrystallization, was were the reagents used
impure, and purify
purpose of congo red and animal charcoal
colorless/clear
what was the color filtrate in recrystallization
small-icebath, large-slow cooling
size of crystals in recrystallization
1g benzoic acid, 100ml water, 5ml chcl3
in first part of extraction, what are the reagents used
chcl3 lies below water
what was the result in extraction
nitric acid, silver nitrate
reagents used for test of chlorides
white, agcl
color of ppt in test for chlorides and name
1g benzoic acid, water
what are the reagents used in sublimation
white crystals
results for sublimation
Note
Flashcard