Recent content by Mayhem

  1. Mayhem

    Side reactions while dissolving silver

    Your descriptions a little hard to follow. Gardening is irrelevant to the chemistry. What I'm seeing is Step 1: H2SO42 (aq) + Ca(NO3)2 (aq) → CaSO4 (s) + 2 HNO3 (aq) A CaSO4 (s) ⇌ CaSO4 (aq) is present, which is shifted to the LHS in an excess of SO42-. Gravity filtration separates the CaSO4...
  2. Mayhem

    Side reactions while dissolving silver

    Impossible to say without knowing what corrosion inhibitor is in the product. Am I correct in assuming that 'lavender' refers to pale violet/purple or is the color intense? Also please elaborate on your procedure, step-by-step.
  3. Mayhem

    Gamma Radiation and Electrolysis

    First of all it's H2O, not H20. To chemists, using 0 in place of O is like using n in place of π is to physicists. Anyway. Gamma radiation isn't free either. Would there be an inherent advantage to spending energy to generate gamma radiation over just using that energy directly to drive an...
  4. Mayhem

    Why is AuCl4 an anion?

    Granted, this approach is only strictly valid if you have knowledge of the bonding, but it is typically always valid for complexes of monodentate ligands.
  5. Mayhem

    Chemistry Why percent yield sometimes less than 100% in chemistry experiments?

    I see what you are asking. Understand that the problem you stated in the thread title is opposite of what actually meant to ask. When the measured yield is higher than the theoretical yield, it is either because the theoretical yield was incorrectly calculated, or because the isolated product...
  6. Mayhem

    Chemistry Why percent yield sometimes less than 100% in chemistry experiments?

    Small thing. Percent yield = (actual yield / theoretical yield) * 100. Without the 100 factor, you just get a ratio, not a % expression.
  7. Mayhem

    Why is AuCl4 an anion?

    Both AuCl3 and [AuCl4]- exist. Chemistry principles get funky when you get to the third row metals (where Au sits) so I can't comment on why exactly, but it would appear that [AuCl4]- is prepared under rather extreme chemical conditions (aqua regia), where an excess of Cl- and H+ are present...
  8. Mayhem

    Chemistry Which of the following will decrease CO bond character?

    Unless Ir is special for this, any option will change the bond properties of the CO ligand, even if the change is small. To convince me otherwise, I'd need to see IR spectra corresponding to option b, c and d as well as the parent IrCl(CO)(PPh3)2. Now it does specify a decrease in triple bond...
  9. Mayhem

    Cyano substituted hydrazines

    Energy storage is one of my areas of interest and indeed, energy density is a key parameter for storage viability. But reversibility, in the sense that you can 'recharge' your storage device is as important for general applications.
  10. Mayhem

    Cyano substituted hydrazines

    It is well known that a high nitrogen to carbon ratio in a molecule is a predictor of positive energetic properties. I can't find a common vendor that supplies the reagent in question, but I'm sure it's out there. Maybe on the Chinese chemical market. Also, PubChem is a terrible resource as...
  11. Mayhem

    Cyano substituted hydrazines

    This is the only published article I could find, and googling 1,2-dicyanohydrazine (or N,N') only returns a few relevant links, one of which being this exact thread. Certainly an obscure reagent. Anyway the hydrazine N-N is already reactive and a CN^{1-} group is electron withdrawing...
  12. Mayhem

    Cyano substituted hydrazines

    Please provide a reference to those articles.
  13. Mayhem

    Chemistry Understanding Reaction Quotient and Molarity

    Careful with describing a "reduction" in reactants. Say decrease/increase instead. Between reactants and products, the only thing that is conserved is mass and charge. Every other quantity is potentially subject to change.
  14. Mayhem

    Random Thoughts 7

    I used a Linux distro for a long time and the only thing that limited my productivity was working around Windows only software, some of which was needed for my studies. Having used Windows exclusively for two years now, I really miss the ease of navigating in Linux. I feel like Windows is made...
  15. Mayhem

    Can you make pure water acidic by adding free protons to it?

    Rule no. 1 chemistry: There are no unbound protons. Rule no. 2 of chemistry: THERE ARE NO UNBOUND PROTONS Rule no. 3 of chemistry: Charges are always balanced by an oppositely charged species. The phenomenon you are describing would not be described by conventional chemistry. You would...