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Chemistry : Recent Questions and Answers (Page 9)

Find answers to your questions about Chemistry or help others by answering their Chemistry questions.

How can I properly calculate the isoelectric point (pI) of amino acids?

The following amino acid is called lysine. I was asked to calculate its isoelectric point, with the given $mathrm pK_mathrm a$ values. ...

Asked on 10/05/2021 by Rahul Verma

1 answer

How do I prepare 2-(3-azido-3-oxopropoxy)ethyl methacrylate from methacrylic acid?

I am having some trouble finding a proper synthesis route for the following product. Originally, I was thinking of reacting methacrylic acid...

Asked on 10/05/2021 by Jonathan G

1 answer

Disproportionation of silver(I) in aqueous solution

Use the following equations to predict whether or not $ce{Ag+}$ ions will disproportionate in solution: $$begin{align}ce{Ag+(aq) + e- &-> Ag} &qquad E^circ = pu{+0.80 V}\ce{Ag^2+(aq)...

Asked on 10/05/2021 by isabel

2 answer

What is "protein redox conformation"?

From an article by Frye et al. [1]:Reduced glutathione (GSH) is the major intracellular redox buffer and is essential in free radical scavenging, redox homeostasis, maintenance of...

Asked on 10/05/2021 by CowperKettle

0 answer

Cyclic voltammetry for irreversible reactions

I'm new to electrochemistry and I was wondering two things, sorry if these two problems are trivial but I just can't find anything close to this in the literature. First,...

Asked on 10/05/2021 by Paperreader

0 answer

Why are antibonding molecular orbitals formed?

When two atomic orbitals make one molecular orbital there must be an antibonding orbital also. Why should they make also an antibonding molecular orbital, such as the $2mathrm b_2$ orbital...

Asked on 10/05/2021 by ordinary chemistry student

1 answer

Reaction of amines with diethyl oxalate (Hofmann amine separation method)

Why does only one molecule of secondary amine react with diethyl oxalate and two molecules of primary amine react with diethyl oxalate? I feel secondary amine also should have reacted...

Asked on 10/05/2021 by Ritwik Das

2 answer

Numerical related to crystallisation of water below its freezing point

Question:There is $16 mathrm g$ of pure water in a container at temperature $-20 mathrm{^circ C}$. A small piece of ice is added to start crystallization. Amount of water in...

Asked on 10/05/2021 by Gaurang Tandon

5 answer

Does acrolein give Fehling's test?

Aromatic aldehydes do not give Fehling's test, which makes me believe that for the same reason acrolein should not. It has a double bond conjugated with the carbon-oxygen double bond...

Asked on 10/05/2021 by JoshIsHere

3 answer

Is any symmetry element conserved during a supra-antarafacial cyclo addition of two cis-butadiene units

I tried to construct a correlation diagram for the [4+4] cyclo addition of two cis-butadiene units. But I failed to construct any meaning full orbitals for the "educt" side where...

Asked on 10/05/2021 by Hans Wurst

0 answer

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