Lab Final
Chemistry 130 with Feigerle at University of Tennessee - Knoxville
About this deck
By: Dee Crawford
Textbook:
Chemistry: The Central Science (11th Edition)
Created: 2010-11-17
Size: 61 flashcards
Views: 458
Textbook:
Chemistry: The Central Science (11th Edition)Created: 2010-11-17
Size: 61 flashcards
Views: 458
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When calcium chloride is added to a saturated solution, the molar solubility of calcium hydroxide-
decreases
"Washing a precipitate"
Add water, stir, centrifuge, and decant
Diluting an acid
Acid is added to the water
Baking yeast is used for what?
Catalyst to decompose H2O2
Color of aqua compled Nickel (II)
green
Two flammable chemicals used in lab
Cyclohexane, ethanol, acetone
In a galvanic cell- relationship between solution concentration and cell potential
^concentration, v cell potential
What is green chemistry?
environmentally friendly chemical work
Color of aqua complex- Cobalt (II)
Pink
Color of aqua complex- Copper II
blue
Ethanols solubility in water
yes!
Burets are read to the
nearest 0.05 ml
Copper II nitrate is disposed in
Heavy Metals
Steps for precipitation being complete
Add reagent, centrifuge, Repeat until no precipitation
When working with ethylenediamine use what precaution?
Work under fumehood
Test lemon juice with what color litmus paper?
blue
Electrons concerning the cathode
They flow to the cathode,
Name one chemical the must be handled in fume hood
Concentrated acids, ehtylenediamine, concentrated ammonia
A student hardly mixed a salt sample, when he added it to the cyclohexane. Upon cooling the mixture, what happens to the value of Delta T
It gets smaller
Chemical used to wet the salt bridge
KNO3 Potassium nitrate
Radioactive decay reactions obey what?
First order kinetics
Air control valve on bunsen burner?
Control quality (cool, hot) of flame
Function of the fume hood?
Remove harmful fumes
Dilute (6M) ammonia is found?
Plastic bottles
What color litmus paper would you use to test from ammonia
red
Long glassware piece that is used in titrating an acid with a base
buret
Job of the buffer?
To keep pH relatively constant with addition of small amount of acid/base
Name of three products when an acid reacts with carbonate salt:
Salt, Carbon Dioxide and water
The addition of oxygen gas will _______ the originial equilibrium value of number of moles of ammonia gas
Decrease
What are balances read to?
The nearest 0.001 g
By what factor would a chemical reaction rate increase if the temperature was increased over 20 degrees Celsius range
4 times
In addition to litmus what three acid base indicators did you use this semester
Phenolphthalein, universal indicator, methyl orange
In the freezing point depression experiment, write the units of the molal freezing point constant
Degree C Kg/mol
Why is it necessary for us to measure the background radiation?
Because it increases the actual isotope count
Acetone is diposed of in
Organic Wastes
Does a phosphate ion, when dissolved in water, increase or decrease the H+ of the water
decrease
Name the products formed when hydrogen peroxide is decomposed by a catalyst
Oxygen and water
Where is a broken pipet disposed?
Glass only
What is the main difference between a cool and hot burner flame?
Cool- no cones. Hot- inner cone
In the vitamin c clock experiment, what appears to be the relationship between the concentration of the reactants and the time of this reaction
Concentratin ^, Time v
The more concentrated sodium chloride solution should have a ___ effect on the freezing point of an aq solution
Greater
Barium 137 is a ___ emmitter
Gamma
In a galvanic cell, E cell is equal to
E cathode- E anode
The lab instrument used to measure electron flow
Voltmeter
What does the titration process involve?
Rinse buret with standardized NaOH, slowly add the base, color fade should persist for more than 30 seconds
`
`
I3 color
Purple
F3 color
Red brown
Basic solutions turn litmus paper
red to blue
Common Spectator ions: anions
Br, I, NO3,Cl,Clo4, ClO3
Cations:
Na, K, Rb, Cs
Examples of redox reactions
leaf change, rusting car
3 Safety equipments in the lab
eye wash station, fire extinguisher, safety shower
Acetic acid/ potassium acetate does what
Acts as a buffer system
Monodentate ligand
Chloride, Water, Bromide, Iodine, Cyanide
Cesium 137 is a ___ emitter
beta
Polydentate ligands
EDTA
What is the effect of Cesium 137 (half life-30 years)
no effect
The addition of water____the original equilibrium value of heat content
Increases
In the presence of ___ starch changes to blue black
iodine
Does a reaction occur when a strip of copper is placed in aluminum nitrate solution?
no
About this deck
By: Dee Crawford
Textbook: Chemistry: The Central Science (11th Edition)
Created: 2010-11-17
Size: 61 flashcards
Views: 458
Textbook:
Chemistry: The Central Science (11th Edition)Created: 2010-11-17
Size: 61 flashcards
Views: 458
About StudyBlue
STUDYBLUE makes things that make you better at school.
Things like online flashcards with photos and audio.
Things like personalized quizzes and friendly reminders about when (and what) to study next.
Think of it as a digital backpack™: access to all of your study materials online and on your phone.
STUDYBLUE exists to make studying efficient and effective for every student, for free. Join us.
“Simply amazing. The flash cards are smooth, there are many different types of studying tools, and there is a great search engine. I praise you on the awesomeness.”
Dennis
Dennis