[Benzene21]

I'm not clear with the p-scale of some substances like pNa, pBa, pCl, etc. Is that the same as pH and pOH? pH = -log(H3O+) and pOH = -log(OH)
so, is pBa = -log(Ba)?

What is the pAg in the titration of 100.0 mL Cl- 0.1000 M when you add 5, 20, 99 and 110 mL AgNO3 0.1000 M?

[plankk]

so, is pBa = -log(Ba)?

It's true.

[Borek]

http://www.titrations.info/precipitation-titration-curve-calculation

[FAC208aussie]

yes, the p-value is negative log10 of the molar concentration of that species. so, so example,

pX = -log₁₀[X].

Remember to find the total number of ions in the system if they come from more than one source.

[Borek]

the p-value is negative log10 of the molar concentration

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