What Ratio of [NH₄⁺]/[NH₃] Would Provide a Buffer of PH

question 45

Multiple Choice

What ratio of [NH₄⁺]/[NH₃] would provide a buffer of pH low enough to avoid precipitation of Co(OH) ₂(s) from a 0.50 M Co²⁺(aq) solution? (K_b for NH₃ = 1.8 × 10^-5 and K_{sp for} Co(OH) ₂= 2.0 × 10^-14

• A)1/50
• B)1/90
• C)1/1
• D)90/1
• E)50/1

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T Test

A statistical test used to compare the means of two groups or the mean of one group with a known value, under the assumption of normally distributed data.

T Procedure

A statistical method used to test the mean of a population, especially useful when dealing with small sample sizes and unknown population standard deviations.

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Data points that significantly deviate from the other observations in a dataset, potentially indicating measurement error or an unusual event.

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