May 29, 2024, 04:53:37 AM
Forum Rules: Read This Before Posting


Recent Posts

Pages: 1 ... 8 9 [10]
91
I am investigating how different transition metal catalysts (with different charges) affect the rate of reaction between Sodium thiosulfate and Iron(III) Nitrate. My catalysts were Ag(I)NO3, Cu(II)SO4, and Fe(III)Cl3. I observed the reaction from above and recorded the time it took for the cross at the bottom of the reaction became visible.

first of all, since I am not changing concentration, how do I find rate of reaction?

Also, I am having a hard time understanding what is happening.
CuSO4 was fastest (average of about 10.83 sec for the cross to appear)despite it being +2., and the other two (+1 and +3) were about the same to each other (around 56seconds). I don't understand the pattern, and what is affecting this.
can someone explain why CuSO4 was a better catalyst and why the other two didn't show much difference to each other? I have no clue what is going on and how exactly the catalysts impacted the reation...

Please help me. Thank you in advance.
92
Analytical Chemistry Forum / Re: Calculation of %Absorbance
« Last post by serotonin on May 13, 2024, 04:50:43 PM »
thanks very much!
93
Organic Chemistry Forum / Re: Essential Oil(s) in Rosemary
« Last post by Borek on May 13, 2024, 02:17:51 PM »
I gave chiralic a molesnack, nice help

Yes, nice answer to an 18 years old post , dug out by a newcomer necroposter, probably using ChatGPT to generate reasonably looking answer ;)
94
Analytical Chemistry Forum / Re: Spontaneous Process?
« Last post by Babcock_Hall on May 13, 2024, 12:55:10 PM »
Under the assumption that the membrane potential is zero, moving potassium ions from outside to inside is non spontaneous.
95
Organic Chemistry Forum / Re: Essential Oil(s) in Rosemary
« Last post by rolnor on May 13, 2024, 12:37:12 PM »
 I gave chiralic a molesnack, nice help
96
Analytical Chemistry Forum / Re: Calculation of %Absorbance
« Last post by Corribus on May 13, 2024, 09:40:45 AM »
If the percent transmitted is X, then the percent absorbed is 100-X (with certain assumptions).
97
Analytical Chemistry Forum / Re: Spontaneous Process?
« Last post by serotonin on May 13, 2024, 07:55:46 AM »
Thank you again so much for the reply. So I have also thought of saying it is favourable but to the left. When it is forward it is non-spontaneous. Also is saying it is electrolytic correct? Sorry if I'm asking too much, I do indeed have my exam today.. :'/ thank you again i appreciate your replies
98
Analytical Chemistry Forum / Re: Spontaneous Process?
« Last post by Babcock_Hall on May 13, 2024, 07:30:46 AM »
A particularly important enzyme in brain cells and in intestinal epithelial cells is the sodium potassium ATPase.  Using ATP hydrolysis, this enzyme transports three sodium ions from inside to outside of the cell and two potassium ions from outside to inside the cell.
99
Analytical Chemistry Forum / Re: Calculation of %Absorbance
« Last post by NotSoSure on May 13, 2024, 07:13:45 AM »
Thank you for your reply... Is there any chance you help me with the equation I need..My exam is in 2 hours :'/ thanks again . Or should I 100-10?
100
Analytical Chemistry Forum / Re: Spontaneous Process?
« Last post by NotSoSure on May 13, 2024, 07:12:12 AM »
Hey thank you for your reply. If it needs a source could I say that it is probably an electrolytic cell? I have my exam in 2 hours and I'm still not sure how to answer this:'/ thanks again
Pages: 1 ... 8 9 [10]