Recent content by starlight5

ammonia protonation? if i just wanted to find the solubility of CaCO3 at a given pH would i need to use those Ka1 and Ka2 and Ksp and the charge balance and mass balance equations ?

so to find the pH dependence of CaCO3 do we have to use the below equations CaCO3 ---> Ca2+ + CO32- H2CO3 + H2O ---> H3O+ + HCO3- HCO3- + H2O ---> H3O+ + CO32- H2O ---> H3O+ + OH- and then do i have to manipulate the equilibrium constant expressions to obtain the solubility at a...

but wouldn't i need the concentration of Ca2+ or CO32- to find the [H3O+] to find pH? i don't understand how the solubility of CaCO3 is related to pH and how do we know NH4Cl is in excess?

How is that related to finding the pH?

how do u calculate the pH of a solution of CaCO3(s) in 1.0 M NH4Cl?

How do u derive a general formula (without undue approximations) to calculate the solubility of CaCO3(s) in a aqueous solution at any pH? Thanks

i titrated with the same sample

EDTA titration?!URGENT NEED HELP we did a lab in school to determine water hardness by EDTA titration. I did three trials , first one require 38mL , 2nd - 50 and third-42 the question was to averge the volumes of EDTA used in the last two titrations and to calculate the moles of EDTA required...