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Chem L final


How do you determine density? Density = Mass(g)/Volume(mL) Density = Slope (dx/dy)
How do you determine area?
A spreadsheet can have _________ on a graph? A best fit line, labelled axes, error bars
What is Molality? moles/Liter
Ferrous ammonium sulfate Fe(NH_4)_2(SO_4)_26H_2O
Acetic acid CH_3COOH
Vinegar CH_3COONa + H_2O
Sodium Hydroxide (Baking Soda) NaOH
Sodium Acetate CH_3COONa
Calorimeter constant is a _____ value positive
What is STP? 0 degrees C and 760 torr
Volumetric measurement tools Beaker, pipet, graduated cylinder
Slope of line change in y/change in x (or y2-y1/x2-x1)
PV=nRT Pressure Volume = moles Rate Temperature
Beer's Law explains relationship between absorbance and concentration
Arrhenius relationship Ln k = -E_a/RT + Ln A
A=abc A - absorbance(M) a - molar absorptivity OR extinction coefficient b - path length c - concentration
How do you determine absorbance? A=abc
How do you determine rate? change in [whatever product]/change in time
How do you obtain rate? Slope of reaction
K [reactant 1 M] [reactant 2 M]
What is the specific rate constant? K
volume reactant(mL) x concentration reactant (M) /total volume(mL)
Molarity moles/Liter
What is ICE? Initial Change Equilibrium
Charles' law V2/V1 = T2/T1, V1/T1=T2/T1, V is inversely related to T
In the redox titration, what is the purpose of ferrous ammonium sulfate? standard
How do you find the limiting reagent?
How do you find the equilibrium constant? K of equation = [C][D]/[A][B]
Oleic acid - reagent CH3(CH2)7CHCH(CH2)7CO2H Dissolved by pentane
Lycopodium powder (pollen) - reagent You put piston oil on water, then sprinkle this. Then after you add one drop of your solution, it makes the blobby shape visible.
6M HCl - reagent added to water in cake pan
Pentane - reagent added to dissolve oleic acid. Added in increments so solution becomes increasingly dilute.
How do you calculate thickness of film? volume/area
How do you get volume of one molecule? thickness cubed (assuming molecule is a cube)
How do you estimate Avogadro's number? volume of one mole/volume of one molecule
Sodium Hydrogen Carbonate (Sodium Bicarbonate, Baking Soda) NaHCO3 (decomposes with heat)
HCl - reagent Added to baking soda, reacts vigorously
Concentration expressed in ____? quantity of solute/quantity of solution
1 L = ___ mL? 1 L = 1000 mL
Molality (M, mol/L) mm/mL
How do you determine concentration? quantity of solute/quantity of solution
n (moles) = ? Weight/molar mass
Sodium Hydroxide NaOH (solvent, titrated into water in experiment 5)
Equivalence point (titration) when equivalent quantities of the substances have been mixed (indicator changes color at end point)
pH = ? -log[H+]
pOH = ? -log[OH-]
Bromocresol green changes yellow to blue over 3.8-5.4 (green at 10)
Phenolphthalein colorless <8, light pink at 8.2 (deep pink at 10)
Thymolphthalein colorless at <8.8, light blue at 9.0
pH + pOH = ? 14
Potassium Hydrogen Phthalate KHC8H4O4 or KHP, serves as primary standard in titration experiment 5. Its the scoopy solid stuff.
phosphoric acid H3PO4 (it's what you put the indicator in)
In experiment 5 (titration intro) k = ? k = no mm NaOH/no mm H2PO4
Potassium permanganate KMnO4 (solution in experiment 6)
Ferrous ammonium sulfate (crystal in experiment 6) Fe(NH4)2(SO4)2 x 6H2O
Phosphoric acid H3PO4
hydrogen peroxide H2O2
converting to K from C add 273
Boyle's Law V is inversely proportional to 1/P, P1/P2=V2/V1
Avogadro's Law V is inversely related to n (at STP), V2/V1=n2/n1
Solution a mixture of something we are interested in (solute) ad all the stuff we are putting it in (solvent)
Potassium Chlorate KClO3
Manganese Dioxide MnO2
What does lifting beaker so that water level is the same as in florence flask do? equalizes the atmospheric pressure
In experiment 8, atmospheric pressure = ? air pressure + water pressure
What is enthalpy? The change in energy of the reactants during a chemical equation, indicated by delta H and usually expressed in kJ
enthalpy change of calorimeter (delta H_D) calorimeter constant (C_D) x change in temperature (delta T)
Heat of reaction (delta H_rx) -(delta H_D)
In experiment 9, HNO3 is the ____ and NH3 is the _____ acid ; base
Created by: haleyBUGoxox



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