Distinguish linear range, dynamic range, and range.
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The pH of a 0.120 M solution of a weak base is 10.97 at 25ºC. Calculate the pH of a 0.0316 M solution of this base at 25ºC.
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derive BET isotherm adsorption equation step by step
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7.) You need to make an aqueous solution of
0.140 M nickel(II) sulfate for an
experiment in lab, using a 250 mL volumetric
flask. How much solid nickel(II) sulfate should
you add?
How many milliliters of an aqueous solution of 0.175 M sodium hydroxide is needed to obtain 5.85 grams of the salt?
8.)
In the laboratory you dissolve 14.0 g of
nickel(II) sulfate in a volumetric flask and add
water to a total volume of 250 mL.
What is the molarity of the solution?
What is the concentration of the nickel
cation?
What is the concentration of the sulfate anion?
b.) In the laboratory you dissolve 17.5 g of
sodium hydroxide in a volumetric flask and add
water to a total volume of 125 mL.
What is the molarity of the solution?
What is the concentration of the sodium
cation?
What is the concentration of the hydroxide
anion?
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Calculate the change in pH when 75.0 mL of a 0.620 M solution of NaOH is added to 1.00 L of a solution that is 1.00 M in sodium acetate and 1.00 M in acetic acid.
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Polarimetry Lab calculations:
|
Isomer |
Observed Degree of Rotation(Raw data) |
|
(+) Carovene |
158.75° |
|
(-) Carovene |
229.75° |
|
Blank |
200.75° |
|
Unknown (X) |
175.25° |
I would like some help to figure out how to do this; I want to make sure that I am doing it correct. Here is what I have done so far:
I believe these are the equations to use:
X observed= X raw - Blank l= 0.8 dm and c= 0.9600 g/cm3
[X]= X observed / lc
Can someone show me the calculations for all of them, this is what I did for Unknown:
My Unknown (X): I did x observed= 175.25-200.75= -25.5°
[X]= X observed / lc -25.5°/(0.8*0.9600)= -33.20°
The equations our teacher gave were:
EE= [X] observed / [X]pure * 100
([X]pure can be found by [X]= Xpure/ lc
I don’t know how to find x pure. What even is that, where can I get it from the numbers. After I get EE,
I need to find how much of (-) and (+) is in the enantiomer (the equation given for that is
EE= [X]+ XA + [X]- (1-X+)
[X]+ and [X]- are supposed to be answers from number 1.
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Please compare and contrast intrinsic versus extrinsic fluorophores. Please be sure to clearly address differences in terms of quantum yield, fluorescence lifetimes, cost, etc.
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The dehydration of 2-methyl-2-butanol in sulfuric acid produces 2 elimination products. However, this same reaction can also undergo substitution. What is the product of the substitution reaction?
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Consider the titration of 0.050 M HCl with 0.050 M NaOH. Calculate the pH: (a) of the pure HCl solution; (b) of 25.00 mL acid plus 12.50 mL base; (c) at the quivalence point; and (d) of 25.00 mL acid and 37.50 mL base.
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Please answer within 1 hour. This is my last question and its due in 1 hour!! :(
What atomic or hybrid orbitals make up the sigma bond between C2 and Cl in dichloroethylene, CH2CCl2? (C2 is the second carbon in the structure as written.) ________ orbital on C2+_________orbital on Cl What is the approximate C1-C2-Cl bond angle?________
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Write the net equation for hydrolysis (with states and charges) of the following:
A) NaC2H3O2
B) NH4Cl
C) ZnCl2
D) KAl(SO4)2
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(1a) Explain what happens in Oxidation AND Reduction electrochemical reactions.
(1b) What happens to the ions formed in the oxidation reaction?
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Give a brief definition of the following terms (a
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