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7:36 AM
1
Q: Comprehensive list of metal alloys along with Moh's hardness scale

Jack MillerMaterial property lists, such as springermaterials.com, has lists of metal alloys and their properties. Is there a similar website that lists alloys along with their Mohs scale hardness? For springermaterials I can't seem specifically find hardness values. For example, when I search "hardness" or "...

 
 
16 hours later…
11:52 PM
2
Q: Are there separate quantity symbols for the pKa of a substance and the pKa of its conjugate acid?

Karsten TheisFor polyprotic acids, we distinguish the different deprotonation equilibria and their equilibrium constants by indices, e.g. phosphoric acid dissociation is described by $K_1$, $K_2$, and $K_3$. Considering the acid/base properties of water, there are two relevant equilibria (protonating or depro...

 

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