alleryStart learning →Which quantity is compared with Ksp to decide whether precipitation occurs?
AThe molar solubility value
BThe reaction quotient Qsp
CThe formation constant Kf
DThe dissociation constant Kd
Answer & Solution
Correct answer: B. The reaction quotient Qsp
1. Precipitation is decided by comparing two numbers.
2. Ion concentrations in a mixture yield a reaction quotient, written Qsp.
3. If Qsp does not exceed the solubility product Ksp, no precipitation will occur.
4. So Qsp is the quantity compared with Ksp.
_Source: OpenStax Chemistry 2e (CC BY 4.0), Ch 15 'Equilibria of Other Reaction Classes', sections 15.1-15.3_
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