1. Notes: 99 / 4 months ago  from scarligamerluss (originally from 3141592)
   

   zuppadivetro:

   3141592:

   No vabbè, muoro. Un sito dedicato esclusivamente alla recensione del contenuto delle lavagne nei porno. http://blackboardsinporn.blogspot.com/

   H2N2O2(HO-N=N-OH)
   +
   H4SIO4(SI(OH)4)
   H₂O + H₂OSO₄
   H3PO3(HPO(OH2))
   H₂SO₄ => SO₄
   H₂OSO₄ = H
   
   Chemistry – A-level/undergraduate level
   
   This is a frustratingly inconsistent approach to writing chemical formulae. On the one hand the teacher has gone to the trouble of also using structural formulae to improve clarity (eg H₂N₂O₂ could be nitramide, but the addition of HO-N=N-OH makes it clear that we are dealing with hyponitrous acid here), but then writes SI (sulphur iodine) instead of Si (silicon) in the formula for orthosilicic acid. This, combined with not using subscripts for many of the numbers, could lead to a great deal of confusion.
   
   Whilst this lesson appears to be aimed at quite a high level, such elementary errors may affect comprehension.

   5/10 - rather sloppy.

   .

    

2. Notes

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