Arsenic, Which Is Toxic, Can Be Removed from Drinking Water

question 5

Essay

Arsenic, which is toxic, can be removed from drinking water by precipitation as the sulfide. Write the net ionic equation for the precipitation of As³⁺ using sodium sulfide, Na₂S.

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Definitions:

Population Proportion

A measure that represents the fraction of the total population possessing a certain characteristic or attribute.

Maximum Allowable Error

The largest error that is tolerated in the results of a measurement, maintaining the results within an acceptable range.

Null Hypothesis

An initial statement asserting that there is no effect or no difference, and any observed deviation is due to chance.

Alternative Hypotheses

The hypothesis that proposes a different conclusion from the null hypothesis, often suggesting a new effect or relationship.