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Legal highs Research Chemicals forum
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Author:
Johny
- Replies:
0
- Views: 280
How to calculate the conversion for a system of reversible and irreversible rea
CnHm+ nH2O⟶nCO + (n+½m)H2
CO + 3H2⇌CH4+ H2O
CO + H2O⇌CO2+ H2
How do I manually calculate the conversion of the process? If my feed does not have CO and H2 at the beginning, how do I consider equation 3?
Author:
Hunter
- Replies:
0
- Views: 244
calculate pH of 0,1M Na3PO4
Hi
[Image:
http://www.chemicalforums.com/Smileys/cl...smiley.gif
]
I need a help for this:
[Image:
http://i66.tinypic.com/291oy28.jpg
]
[size=medium][color=#000000][font=Verdana, Helvetica, sans-serif]I have to calculate pH of Na3PO4 using the CHARGE BALANCE...and using also some a
Author:
Mcmanson
- Replies:
0
- Views: 288
Calculate osmolarity of ammonium acetate
Hi,
I have a solution of 150 mM of ammonium acetate in water. How do I calculate the osmolarity of this solution?
I understand that an osmole (Osmol) is 1 mol of particles that contribute to the osmotic pressure of a solution and that NaCl breaks into two particles in solution (both Na and Cl), thus giving 2 Osmols/liter. I just don't know how to do this for ammonium acetate!
[size=medium]From my reading online it seems ammo
Author:
Lucas8
- Replies:
0
- Views: 296
calculate pH at two different temperature
Hi
I have some doubt with this question:
Calculate:
a)the pH of HCl 0,01M at 25 °C, where pkw=14
b)the pH of HCl 0,01M at 100 °C , where pkw=12
I know that:
pH= - log[H+]
[H+] = CHCl = 0,01M (strong acid)
a) pH= 2
[size=medium]But for the b) pint what I have to do?? Why does the exercise give me
Author:
Owenet
- Replies:
0
- Views: 381
Calculate standard enthalpy change for volcanic eruption
Hey, I'm having trouble with this problem. I know I have to switch the equations around and add them together but can't get it equal what I need.
Q.
2 H2S(g) + 3 O2 ---> 2 SO2(g) + 2 H2O(g)
[size=medium][color=#000000][font=V
Author:
Joshu44
- Replies:
0
- Views: 313
calculate pH NH3/Ag+ solution
HI!!
I don't understand how to calculate pH and [Ag
+
] of a solution of:
[size=medium]
NH
[color=#000000][font=Verdana,
Author:
Andro07
- Replies:
0
- Views: 597
Urgent - How do I calculate the Eº for this process?
Calculate Eº for the following process: AgIO3(s) + e- ::equil:: Ag(s) + IO3-
I know that there's the half reaction Ag++e- ::equil:: Ag(s) and its standard potential is +0.799.
But I'm given no other piece of information to determine Eº of the entire cell!!
I know Ecell = ΔEº - (0.0592/n)log [P]/[R].
But I don't even know Ecell!!
Please help
Author:
Electra
- Replies:
0
- Views: 358
calculate pH of a diprotic acid
Hi
I have to calculate the pH of a diprotic acid like H2SO4 using charge balance and the concentration expression( that i find with Ka expression + mass balance) for each species involved in the charge balance.
Now with this method for H2SO4 i have:
Mass balance: C= [H2SO4] + [HSO4 -] + [SO4 2-]
Charge balance: [H+]=[OH-] + [HSO4-] + 2[SO42-]
And i get:
[size=
Author:
Zora
- Replies:
0
- Views: 240
How to calculate the cross-sectional area of stearic acid
Hi chemistry experts, I need your help.
One of my pre-lab question ask me to calculate the cross-sectional area of stearic acid.
[size=medium]The lab manual states: In order to do this, you will first need to develop a method for estimating the cross-sectional area and the length of a stearic acid molecule. You can estimate both using a bit of geometry and by approximating the stearic acid molecule as a chain containing 18 carbon atoms with a bond
Author:
Zora
- Replies:
0
- Views: 341
How does one calculate the volume of the solute and solvent given molality?
Ok so I'm suppose to calculate how many milliliters of the solute (ethylene glycol) and the solvent (tert-butanol) i should use to make a 20mL solution which has a molality of 1m. I've searched all over the internet and can't seem to find a similar problem.
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