All Questions
Tagged with aqueous-solution biochemistry
20
questions
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3
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475
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Aqueous state on CO2 and O2 in the Photosynthesis Chemical Equation
While reading through a book I came across the equation for photosynthesis:
$$ \ce{6CO2(aq) + 12H2O(l) -> C6H12O6(aq) + 6O2(aq) + 6H2O(l)}\tag{1} $$ in the presence of sunlight + chlorophyll.
For ...
- 99
-2
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1
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109
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Sodium Citrate / Sodium Phosphate Buffer Calculations
I'm trying to work through the calculations of a specific paper (linked here / below) but, my numbers are way off and I can't get them to match for the life of me. I need to make the same buffer but ...
2
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1
answer
606
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How does CO2 'dissolve' in water (or blood)?
I'm trying to understand CO2 dissolved in blood, carbonic acid and the bicarbonate ion. I think of 'dissolving' as in NaCl dissociating into Na+ and Cl- ions sloshing around in water. CO2 isn't ...
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How much salt in a cup of water would it take to neither hydrate nor dehydrate the average person? [closed]
I don't know a lot about chemistry, and this question came up during lunch with my friend. I was interested in this question so I thought I could ask here. Sorry if I didn't use the right tags.
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3
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When an aqueous extract of a substance is said to be administered at a certain quantity, is the quoted mass analogous to one as original substance?
I'm trying to read studies about the possible toxicity of the leaves of some plant often said to possess positive medicinal properties.
In the studies, performed on rats, it is usually said that an ...
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2
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1
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124
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Does CH3COOH + H2O (vinegar) lose its antibacterial and antiviral properties when exposed to air?
I have been reading about using CH3COOH + H2O (vinegar) as a mild antibacterial and antiviral agent. For example: https://pubmed.ncbi.nlm.nih.gov/15698693/
Note, before anyone gets confused (or ...
0
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1
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2k
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Is the solution isotonic, hypertonic, or hypotonic?
The problem is shown below. I don't understand how can the tonicity of a solution be determined if the solution has multiple solutes dissolved in it.
Do I take the total sum of the mass of solutes ...
- 173
1
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1
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77
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The time-dependent pH value in a fermentation
I want to know if someone has supporting tips or solutions to my problem:
In biotechnology, fermentations are used to grow microorganisms. These need a specific media/broth in which temperature, pH, ...
- 103
5
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1
answer
7k
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Why is copper(II) sulfate added drop by drop during the Biuret test?
The Biuret test is a test for proteins. The procedure is to add a strong base, such as NaOH, to dissolve the protein. After that, copper(II) sulfate is added drop by drop into this until a (violet) ...
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0
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Cationic Detergent with no odor [closed]
I am looking for a cationic detergent for a project. Unfortunately most ( or all?) cationic detergents are quaternary ammonium that smell like rotten fish or even worse
The product I am working on ...
- 2,141
3
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Why are different colors, according to sugar concentration observed in Benedict's test?
Colors range from green yellow orange to red. How does the sugar concentration and Cu2O concentration cause this?
I know Cu2O is red. Why is there a green or yellow color instead of just red or some ...
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1
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2
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81
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In this specific case is the proton considered product or catalyst?
Assuming we have a reaction of
$$\ce{CO2 + H2O -> HCO3- + \color{red}{H+}}$$
then is the proton (in red) is considered a product or a catalyst?
I read the Wikipedia article titled Product (...
0
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1
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3k
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Making artificial sweat
I'm currently working on a chemistry investigation wherein I need to dilute a compound with artificial sweat. I have looked at various forums, including this, which gave answers, but is very outdated.
...
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Lugol's iodine 5 % aqueous solution
There is Lugol's 5 % solution with 5 g of pure iodine and 7.5 g of potassium iodide.
In one ml there should be 12.5 mg of iodine in sum.
But there are suggestions telling that two drops of this ...
- 103
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What chemicals could be added to human urine to cause harmful chemicals to precipite out?
What chemicals could be added to human urine to render it drinkable with no harmful side effects?
Urine is salty and contains other dissolved solids. Thus, drinking untreated urine would result in ...
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