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let us assume pure water instead of seawater is used as the solvent for simplification With...

let us assume pure water instead of seawater is used as the solvent for simplification

With the concentration of [Ca2+] at 1.07x10-5 M , what is the minimum concentration of [CO32– ] to keep CaCO3 from dissociation? (Ksp of CaCO3: 3.4 x 10–9 ). What kind of salt is CaCO3, acidic, basic or neutral?

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Answer #1

You have the expression of Ksp:

Ksp = [Ca + 2] * [CO3-2]

3.4x10 ^ -9 = 1.07x10 ^ -5 * [CO3-2]

It clears [CO3-2] = 3.18x10 ^ -4 M

It is a basic salt for the formation of:

CO3-2 + H2O = HCO3- + OH-

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