In the Bayer Process, the Purpose of Filtration After the Ore

question 2

Multiple Choice

In the Bayer process, the purpose of filtration after the ore has been digested in concentrated sodium hydroxide is .

• A) to remove the sodium ions from the sodium hydroxide solution
• B) to separate the soluble aluminum complex from the insoluble iron impurities
• C) to remove the anode sludge
• D) to separate the insoluble aluminum oxide from the soluble iron impurity
• E) to separate the aluminum metal from the hydroxide ions

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Definitions:

Independent Samples

Samples that are selected from two populations in such a way that the samples are not related or do not influence each other.

One-Way Analysis Of Variance

A statistical method used to test the difference between the means of three or more independent groups on a single factor to determine if at least one group mean is statistically different.

Kruskal-Wallis Test

A non-parametric statistical test used to compare three or more independent samples to determine if they come from the same distribution.

Wilcoxon Tests

A nonparametric statistical test used to compare two paired groups to assess whether their population mean ranks differ.