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calculation
Legal highs Research Chemicals forum
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calculation
Legal highs Research Chemicals forum
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calculation
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Author:
Liam
- Replies:
0
- Views: 286
concentration calculation
I have a solution with 10 mM CTAC(Cetyltrimethylammonium chloride solution).I want to brought this solution to 50 mM CTAC. How much of CTAC 100 mM should I add to this solution to reach the final concentration of 50 mM CTAC?
Author:
Liam
- Replies:
0
- Views: 520
Issues with the calculation of the Iodine Clock Reaction activation energy
Hey guys, to put it simply i've had issues for the past few days calculating the iodine clock reaction activation energy.
I've tried changing everything, but the iodine clock reaction activation energy just doesn't seem right.
Here's my process, please tell me if there is anything wrong with it, btw it's the persulfate variaton:
2 I- + S2O82- → I2 + 2 SO42-
[size=medium]I2 + 2 S2O32- → 2 I- + S4O62-[/
Author:
William9
- Replies:
0
- Views: 322
chemistry calculation help please
[size=medium]Hi im sorry i dont know if this is the correct forum to ask this question in but here it is:
I need to calculate the riboflavin content for a solution. It was made from 1 vitamin tablet dissolved in 20ml of water. Then the solution was made up to 100ml with neutral buffer. Then a 1:50 dilution was made with the solution. The concentration of riboflavin in the 1:50 solution was 86 μg/L. I need to know the riboflavin content in the tablet, in mg. Could anyone be kind enough to hel
Author:
Jacod
- Replies:
0
- Views: 404
PH calculation of buffer
I'm completely lost with this question. How do I use the Henderson Hasselbalch equation here? The pKa for Phenol is 9.95, and the answer to the question is D.
Author:
Samuel
- Replies:
0
- Views: 275
chemistry calculation help please
[size=medium]Hi im sorry i dont know if this is the correct forum to ask this question in but here it is:
I need to calculate the riboflavin content for a solution. It was made from 1 vitamin tablet dissolved in 20ml of water. Then the solution was made up to 100ml with neutral buffer. Then a 1:50 dilution was made with the solution. The concentration of riboflavin in the 1:50 solution was 86 μg/L. I need to know the riboflavin content in the tablet, in mg. Could anyone be kind enough to hel
Author:
Diego7
- Replies:
0
- Views: 525
Determing whether a mixture will form a precipitate from Ksp calculation
Consider solutions A and B:
Solution A: 0.010 mol/L Pb
2+
(aq)
[size=medium]
Solution B: HBr
[color=#000000][font=Verdana,
Author:
Wyatt
- Replies:
0
- Views: 346
% error calculation
If y
2
=4x and 0.1% error is incurred for x, the percentage error involved in y will be:
(a) 0.4 ,(b) 0.025, © 0.1, (d) 0.05
[size=medium][color=#000000][font=Verdana, Helvetica, sans-se
Author:
Emily31
- Replies:
0
- Views: 376
3 simple practical calculation questions
Hi all,
These 4 questions (I have no problem with the first one) are related. They are from a calculation refresher quiz so are not mean to be too difficult, but I have no idea how to approach them.
[color=#000000][font=Verdana, Helvetica, sans-serif]
Here are the questions and why I'm stuck:
[/font
Author:
Anthon
- Replies:
0
- Views: 298
Ksp Calculation Question
For a saturated solution of an unknown metal hydroxide, M(OH)2, 12.75 mL of this solution were required to neutralize 25.00 mL of 0.02 M HCl. Calculate the KSP of the metal hydroxide.
I've tried the problem two different ways because I'm not sure whether I'm supposed to divide the concentration of M(OH)2 by 2 to get the concentration of OH- or if I should multiply it by 2.
M(OH)2 ::equil:: M2+ + 2OH-
[size=medium]This makes mo
Author:
Luca
- Replies:
0
- Views: 541
Calculation of temperature change (help)
I have found how to calculate energy transfer for temperature change, but I am not sure how to calculate temperature change for a certain quantity resting in an ambient temperature. I just haven't been able to find a formula containing all the variables I have. Here is my question:
[size=medium]In a room with an ambient temperature of 78°F, how long would it take for 7 gal. of 60°F water to raise 1°F? Answer and explanation of how to calculate would be much appreciated.[
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