Quick questions on Solubility equilibria and Ksp - TCE Chemistry (Tasmania)

Q: What is relating Ksp to solubility?

Molar solubility s is the moles of salt that dissolve per litre to give a saturated solution. From the dissolution equation, the ion concentrations are written in terms of s, then substituted into the K_sp expression.

2short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.

What is the dissolution equilibrium?

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When an ionic solid is only slightly soluble, a saturated solution reaches equilibrium with the undissolved solid:

What is relating Ksp to solubility?

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Molar solubility

s

is the moles of salt that dissolve per litre to give a saturated solution. From the dissolution equation, the ion concentrations are written in terms of

s

, then substituted into the

K_{sp}

expression.

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