Kavya NaikDropperSample· 3d ago
Arrhenius: my Ea for 'rate doubles per 10 K' is 53.6 kJ but the book says 52.9. Who is right?
Also what does the factor P actually do and what does a catalyst change?
#chemistry
Stories and questions with this tag.
- Kavya NaikDropperSample· 5d ago
Green chemistry examples in NCERT: which process replaced which (dry cleaning, bleaching, ethanal)? Mixing up the chemicals
Amma says I study chemistry like I'm doing a quiz show, fast but with mistakes 😅. Soil pollution and green chemistry is one of the "easy" last pages that I still get wrong in tests because the examples blur. What I know:
- Ishita GoyalDropperSample· 5d ago
Lucas test turbidity timing for primary, secondary and tertiary alcohols, and why neutral FeCl3 works only for phenol
I'm building my one-page template for alcohols, phenols and ethers distinction tests on top, named reactions below and a few cells are still empty. Lucas test: I know the reagent is conc. HCl with anhydrous ZnCl2. I know
- Farhan ShaikhDropperSample· 6d ago
Why is heavy water used as a moderator and not normal water? And why isn't hydrogen already the fuel everyone uses?
Revising Hydrogen again 3rd time lol, budget wale notes bhi ab ghis gaye . Two things that I never got logically. 1. NCERT says D 2O is used as a moderator in nuclear reactors. A moderator slows neutrons down. But normal
- Siddharth RaoDropperSample· 8d ago
van't Hoff factor for association and dissociation: deriving i with α, and why NaCl never shows exactly 2
Second attempt, and I want this chapter to be a strength.
- Mehak AroraDropperSample· 9d ago
Why is chloroform kept in dark brown bottles filled to the brim, and what is phosgene doing in NCERT?
It's 2 am and I can't sleep so I'm revising polyhalogen compounds under a blanket with a torch my mum thinks I'm sleeping . NCERT says chloroform is stored in closed dark brown bottles, completely filled so that air is k
- Farhan ShaikhDropperSample· 10d ago
Carbonate and sulphite both turn lime water milky in salt analysis, how do I tell them apart?
Practising anion tests in my notes can't afford a lab at home so I make flow charts from the book . I hit a wall at the dilute H2SO4 group. When I add dilute sulphuric acid to a salt, a colourless gas comes off and passe
- Lakshmi TripathiDropperSample· 13d ago
Shapes of XeF2, XeF4, XeF6 and XeO3 by VSEPR, and why only xenon forms compounds easily
I don't post much, but this one has been bothering me for days. The noble gas chapter. We were told noble gases are "inert", and then straight away we're told xenon forms fluorides and oxides. Why xenon and not helium or
- Kavya NaikDropperSample· 16d ago
Molarity, molality and mole fraction: which depends on temperature and how do I not mix up the denominators?
Amma says 'recheck the basics' every time I get a calculation wrong, and she's right.
- Siddharth RaoDropperSample· 16d ago
Synergic bonding in metal carbonyls: why does back-donation weaken the C-O bond but strengthen the M-C bond?
Second attempt, so I should know this by now, but metal carbonyls were never properly clear in my head last year. I memorised "synergic" and moved on. This time I want to actually understand it. What I think I know: CO d
- Lakshmi TripathiDropperSample· 19d ago
How do I know a dynamic equilibrium hasn't just stopped? And does a catalyst change Kc?
I read the NCERT equilibrium chapter twice and one word keeps bothering me: "dynamic". The book says at equilibrium the rate of forward reaction equals the rate of reverse reaction. And that concentrations stay constant.
- Ishita GoyalDropperSample· 21d ago
E°cell from standard reduction potentials: why not multiply by the coefficients? And does Cu reduce Fe³⁺?
I like having a clean template for every type of question, and electrochemistry is the only chapter where I can't make one. Let me show where my template breaks. Given: \text{Fe}^{3+} + e^- \to \text{Fe}^{2+}\quad E^\cir
