INO-19

Solubility product (AB)

Ksp = s² for AB(s) ⇌ A+ + B−. Molar solubility s = √Ksp.

Reading speed

SolubilityKsp

Governing equation

K_{sp}=s^2,\quad s=\sqrt{K_{sp}}

where

K_{sp}: Ksp (—)
s: Molar solubility (mol/L)

Lecture brief

Historical brief

Pauling and Allred–Rochow electronegativity, Kapustinskii lattice energy, CFSE and Goldschmidt radii organise the periodic solid. The sheets predict bond character and crystal packing. This sheet (INO-19 — Solubility product (AB)) is the form associated with Ksp. Working symbols: $K_{sp}$ $\rightarrow$ $s$ . Activities of pure solids are 1. Common ions and complexes shift the apparent s.

Purpose

Purpose: compute

s

from

K_{sp}

in Inorganic chemistry via

K_{sp}=s^2,\quad s=\sqrt{K_{sp}}

Ksp = s² for AB(s) ⇌ A+ + B−. Molar solubility s = √Ksp. Use it when a real inorganic chemistry question must be answered in SI before a code check.

Live realistic example

In symbols

Live case. Given

K_{sp} = 1.000e-10\,\mathrm{—}

, the governing relation

K_{sp}=s^2,\quad s=\sqrt{K_{sp}}

yields

s = 1.000e-5\,\mathrm{mol/L}

. Binary 1:1 salt, no hydrolysis. Move a slider: the numbers are this situation, not a canned story.

Calculator

Inputs

Ksp K_{sp}1e-10 —

Outputs

Molar solubility s0.000010 mol/L

Reading speed

Watch on YouTube

Free library

Full library

Free PDF / open book

YouTube channels

00:0 / 00:08

Narration of this film

Binary 1:1 salt, no hydrolysis.

Activities of pure solids are 1. Common ions and complexes shift the apparent s.

Reading speed

Watch on YouTube