Scratching causes cracks and crevices on the surface of the flask (though microscopically). These will act as favorable sites for nucleation, which leads to the formation of crystals.
For example when the northern hemisphere is experiencing summer it is tilting toward the sun and the Southern Hemisphere is experiencing winter and is tilting away from the sun
I’m not too sure because i forgot about this but i thik it’s D, good luck
<span>coefficient is 2
2Al (s) + 3 ZnCl2s (aq) --> 3 Zn (s) + 2 AlCl3 (aq) </span>
