/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 21 The reagent used in the detectio... [FREE SOLUTION] | 91Ó°ÊÓ

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The reagent used in the detection of fluoride in water is \(\ldots \ldots\) (a) Phenolphthalein (b) Zirconium-alizarin \(\mathrm{S}\) (c) Soda lime (d) Bayer's reagent

Short Answer

Expert verified
The reagent is (b) Zirconium-alizarin S.

Step by step solution

01

Understanding the Problem

We need to identify the reagent that is specifically used for the detection of fluoride ions in water from the given options.
02

Review the Options

Let's examine each option: (a) Phenolphthalein: This is a pH indicator commonly used in titration. (b) Zirconium-alizarin S: This reagent forms a complex with fluoride ions and is often used in chemical analysis of fluoride. (c) Soda lime: This is used to absorb carbon dioxide, not fluoride. (d) Bayer's reagent: This is used for testing for the presence of unsaturated hydrocarbons.
03

Identify the Correct Reagent

From the reviewed options, Zirconium-alizarin S is used to detect fluoride ions in water because it forms a color complex with the fluoride ions, making it possible to visually detect their presence.
04

Conclude the Answer

Based on the analysis, Zirconium-alizarin S is the correct reagent for detecting fluoride in water.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Zirconium-alizarin S reagent
The Zirconium-alizarin S reagent is renowned for its usefulness in detecting fluoride ions in water. This chemical reagent is specifically designed to form a colored complex with fluoride ions. This interaction allows for visual detection, as the resulting complex possesses a distinct color that indicates the presence of fluoride in the sample. Zirconium-alizarin S is highly sensitive and can detect even low concentrations of fluoride, making it a preferred choice in many water testing applications.

One of the notable features of this reagent is its ability to clearly indicate the amount of fluoride in water, which is crucial for ensuring water safety and compliance with quality standards. Its ease of use and visual color change provide a straightforward method for checking the presence of fluoride without the need for complex equipment, thus adding to its popularity.
Chemical analysis of fluoride
Chemical analysis of fluoride in water is essential to ensure the safety and health of those consuming it. Fluoride occurs naturally in water, but in high concentrations, it can be harmful. Accurate detection and quantification of fluoride levels are therefore key. The Zirconium-alizarin S reagent is a critical tool in this analysis, providing a reliable means of measuring fluoride concentrations through chemical interaction.

Using this reagent involves adding it to the water sample, where it will bind to any fluoride ions. The reaction between the reagent and the fluoride results in a colorimetric change, which is then analyzed to determine the fluoride concentration. This method is both efficient and easy to interpret, with changes in color corresponding directly to variations in fluoride levels. The use of such a reagent simplifies the analysis, which is especially beneficial in field conditions where complex laboratory setups are unavailable.
Water quality testing
Ensuring excellent water quality is a priority for health and safety. Water quality testing encompasses various parameters, including the detection of fluoride. High fluoride levels can lead to health issues, making its monitoring essential. Techniques for testing water quality often involve chemical reagents that react specifically with target contaminants.

The use of reagents, such as Zirconium-alizarin S, facilitates the detection of fluoride among other constituents in water. Water quality testing typically involves sampling water and introducing reagents that reveal the presence or absence of specific ions through color changes or other detectable reactions. With advancements in water testing methods, checks can be performed almost instantly, providing immediate feedback on the water's condition. Critically, regular water quality testing helps in maintaining safe consumption levels and adherence to environmental regulations.

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