Homework Statement
1) What other nitration products in a electrophilic nitration of benzoic acid would be formed if each reaction were carried out at a higher temperature?
2) The nitration of hydroquinone leads to a low yield of nitrohydroquinone. Propose the structure of the major product...
[Chemistry Lab] Cannnizzaro Reaction
Hi! I am having some questions about my chemistry lab.
In the lab we are given 1 of the 5 unknown aldehyde (benzaldehyde, anisaldehyde, nitrobenzaldehyde, chlorobenzaldehyde, and dimethoxybenzaldehyde) and reacts it with methanol and KOH to undergo...
Homework Statement
Calculate the potential of a Pt electrode immersed in a solution that is 0.0263M in K2PtCl4 and 0.1492M in KCl.
The answer given in 0.78
Homework Equations
E = Eo - 0.05912/2 * log Q (Nernst Equation)
The Attempt at a Solution
We try looking at the reduction of PtCl4...
Can somebody explain how do you write a Mass Balance or Charge balance for a acid-base equilibrium? Let say, if you are given 0.01M Zn(OH)2 in a saturated NaOH solution and also given that Zn(OH)2 + 2OH- -> Zn(OH)4(2-) how would you solve the mass balance/charge balance? I really have no idea...
1. Homework Statement
Given the following half-reactions:
Ce4+ + e− → Ce3+ E° = 1.72 V
Fe3+ + e− → Fe2+ E° = 0.771 V
A solution is prepared by mixing 7.0 mL of 0.30 M Fe2+ with 8.0 mL of 0.12 M Ce4+.
Calculate [Ce4+] in the solution.
I've got the potential of a platinum electrode...
[Chemistry] Another electrochemistry question
Homework Statement
Given the following half-reactions:
Ce4+ + e− → Ce3+ E° = 1.72 V
Fe3+ + e− → Fe2+ E° = 0.771 V
A solution is prepared by mixing 7.0 mL of 0.30 M Fe2+ with 8.0 mL of 0.12 M Ce4+.
Calculate [Ce4+] in the...
What is the different between spontaneous reduction and spontaneous oxidation? For spontaneous reduction you need to have Ecell to be (+), then what about spontaneous oxidation?
Thanks.
Homework Statement
I am working on a lab about pKa of phenol, and I don't understand how to do the following questions. Can someone please kindly help me??
1)
Why was the rinsing of glassware with acetone not allowed in this experiment?
T/F Acetone has a UV absorption itself and causes...
please help!!!! questions on pKa of Phenol
Hi, I have some questions regarding the pKa of Phenol lab that I am working on right now.
1) What would cause the absorbance curves to not go through the isosbestic point?
For this one, I know that isosbestic point is not pH dependent so pH won't...
Homework Statement
For solution A the concentration is 7.00x10^-4 mol/L. You transfer 10ml of the solution A out into a 10 dram vial and add 10mL of 0.1M HCL acid solution, and the new mixture is called solution B. What is the concentration of solution B?
Homework Equations
The Attempt...
this is the process i got so far
(x^2/2)((y^2-x^2)^(3/2))/(3/2)(-1/x^2)
but one thing i don't understand, for the (-1/X^2), is this a proper intergral step?
what about this one?
how do you integrate x(y^2 - x^2)^(1/2)? my TA says the answer is (-1/3)((y^2 - x^2)^(3/2)) but i don't get where is the (-1/3) comes from....
I don't understand for integral ysin(xy)dx = -cos(xy) for a=1 b=2. I know sin's integral is cos, but I don't understand how to eliminated the y in the left equation so it become the right equation. Please help!
Homework Statement
What volume of 0.200M HCl must be added to 250.0ml of 0.300M sodium mandelate to produce a buffer solution with a pH of 3.37?
Homework Equations
The Attempt at a Solution
For 2 and 3, can I use the equation pH = pKa + log [A-/HA]? but for HCl isn't that 100%...
For example: if i have a point (1, -1) in the forth quadrant of the xy plane. How do you convert it to angle = [7(pie)/2]+2n(pie) format? i just forget how to do that part. Also, what if the answer for tan-1(angle) is not a whole #, ex: 53.1, then how do you do the conversion? Thank you.
Homework Statement
Comet moves around the sun in a very ellipical orbit around the sun. As it approach, in 1986, Comet Halley was 8.79x10^7km from the sun and moving with a speed of 54.6km/s. What will be the comet's speed be when it crosses Neptune's orbit in 2006?
length of comet from...
o.....
okay so in general, if we want to know the equation for An to do the ratio test, the An equation we need is derive from the f^(n)(x) pattern right?