Use the reaction quotient to predict whether a precipitate will form. If 18.0 mL of 2.61×10-4 M CaBr₂ are added to 22.0 mL of 4.50x10-5 M NaOH, will solid Ca(OH)2 (Ksp 7.9x106) precipitate? = If a precipitate will not form, what hydroxide ion concentration will cause a precipitate of calcium hydroxid to form? If a precipitate will form, what is the minimum [OH-] that could have been present without initiating precipitation? Assume the total volume used in the above example. M
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![**Topic: Predicting Precipitation Using the Reaction Quotient**
**Example Problem:**
- Determine if a precipitate will form when solutions are mixed.
**Problem Statement:**
If 18.0 mL of 2.61×10⁻⁴ M CaBr₂ are added to 22.0 mL of 4.50×10⁻⁵ M NaOH, will solid Ca(OH)₂ (Ksp = 7.9×10⁻⁶) form?
[Text Box for Answer]
**Further Analysis:**
- If a precipitate will not form, identify the hydroxide ion concentration needed to cause a precipitate of calcium hydroxide.
- If a precipitate will form, determine the minimum [OH⁻] that could have been present without triggering precipitation. Assume the total volume used is as stated.
[Text Box for Answer] M
**Note:** This exercise involves calculating the reaction quotient and comparing it to the solubility product constant (Ksp) to predict precipitation.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F9d65d074-1570-4831-8dec-170f6bb6e3ab%2Fad90a1e0-29fa-4cc8-9b28-6a44591664ae%2Fbixu159_processed.jpeg&w=3840&q=75)
Reaction quotient is based on the initial concentrations. Reaction quotient is used to predict whether a precipitate will form or not.
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