Chemistry Questions, Problems & Solutions : TransWikia.com ~ Page 14

Negative DBE/Degree of Hydrogen Deficiency?

I tried calculating the Index of Hydrogen Deficiency for C6H15SiCl, and I get negative one. I get this value by subtracting the number of chlorine and hydrogen atoms from that...

Asked on 01/04/2021 by Uchuuko

0 answer

How can we tell if a substitution reaction will be thermodynamically favoured

My understadning was like in the case of a cyclohexane we would see a thermodynamically favoured reaction if an axial substituent became equitorial in the case of a inverted Sn2...

Asked on 01/02/2021 by Ali Rizwan

0 answer

Dynamic viscosity of gas mixture (appropriate estimation)

What estimation of the dynamic viscosity $eta = f(T)$ $([eta] = pu{Pa·s})$ of the gas mixture components would you recommend during adsorption at a low temperature, approx. ...

Asked on 12/31/2020 by Josh E.

0 answer

My Misconception of Entropy

It was recently brought to my attention that my understanding of entropy is wonky at best. In my experience, entropy was introduced (superficially at best) during general chemistry/foundations of inorganic...

Asked on 12/31/2020 by dval98

1 answer

Calcium chloride + starch desiccant packs inside PPE for ebola workers?

(First question on stackexchange, apologies for any faux pas) Ebola workers get drenched in sweat while working inside their personal protective equipment. There's a discussion happening over on OpenIdeo...

Asked on 12/30/2020 by Jason Holt

0 answer

Why is maximum buffer capacity for some diprotic buffers not when pH = pKa?

According to Rajkovic et al. [1]:$$β = frac{[ce{H+}]}{K_mathrm{w}} + 2.303cdotfrac{[ce{H+}]cdot K_mathrm{a}cdot c}{[ce{H+}] + K_mathrm{a}}$$ where $K_mathrm{a}$ is the dissociation constant of the acid; $c$...

Asked on 12/29/2020 by YeRyeon Seo

1 answer

Using Beer-Lambert law to calculate light intensities

Supposing the mean absorption coefficient of seawater in the visible region is $pu{0.8 m-1}$, calculate the depth at which a diver will experience half the surface light intensity. I...

Asked on 12/23/2020 by lblindner

1 answer

Converting bromobenzene to 1‐bromo‐3‐methylbenzene

I started by taking $ce{FeCl3}$ to reduce electron-giving capacity of $ce{Br}.$ Then we need a methyl at meta, so...

Asked on 12/23/2020 by Rover

1 answer

Coordination compound nomenclature for [Cu(acac)(bpy)]BPh4

The title says it all really. I thought it would be acetylacetonatobipyridinecopper(II) tetraphenylborate. Is this correct? I feel as though it looks a bit clumsy and wasn’t sure if I...

Asked on 12/21/2020 by Marina Calder

0 answer

Why are alkali metal compounds like sodium hydride or sodium amide strong bases but weak nucleophiles?

I understand why compounds such as $ce{NaH}$ or $ce{NaNH2}$ are weak nucleophiles: as they aren't very soluble in organic solvents, they react only on the clusters' surface. But...

Asked on 12/19/2020 by NormoOrgo

1 answer

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