When Equal Volumes of the Indicated Solutions Are Mixed, Precipitation

question 56

Multiple Choice

When equal volumes of the indicated solutions are mixed, precipitation should occur only for: barium fluoride 1.0 × 10^-6 calcium carbonate 2.8 × 10^-9
Calcium fluoride 5.3 × 10^-9
Magnesium fluoride 3.7 × 10^-8
Silver carbonate 8.5 × 10^-12

• A) 2 × 10^-5 M Ag+ + 2 × 10^-5 M CO₃ ^2-
• B) 2 × 10^-5 M Ca²⁺ + 2 × 10^-5 M CO₃ ^2-
• C) 2 × 10^-4 M Ca²⁺ + 2 × 10^-2 M F-
• D) 2 × 10^-5 M Mg²⁺ + 2 × 10^-6 M F-
• E) 2 × 10^-3 M Ba²⁺ + 2 × 10^-3 M F-

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Definitions:

Significant Correlation

Significant correlation refers to a statistical relationship between two variables that is unlikely to have occurred by chance, indicating a meaningful association.

Causal Relationship

A relationship between variables in which changes in one variable demonstrably result in changes in another.

Type I Error

The incorrect rejection of a true null hypothesis, often referred to as a "false positive."

Confidence Interval

A statistical range, based on sample data, within which there is a specified probability that the value of a parameter lies.