/*! 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 108 Describe the process by which th... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 8: Problem 108

Describe the process by which the ion exchanger in a home water softener is regenerated for further use.

Short Answer

Expert verified
Question: Explain the process of regenerating an ion exchanger in a home water softener. Answer: Regenerating an ion exchanger in a home water softener involves a series of steps: (1) understanding the basic components of the system, which include a resin tank, brine tank, and control valve; (2) describing the ion-exchange process where hard water ions are replaced with sodium ions; (3) recognizing when regeneration is necessary due to the resin beads' saturation with calcium and magnesium ions; (4) initiating the brine draw, where a concentrated brine solution is created and introduced to the resin tank; (5) reversing the ion exchange to recharge the resin with sodium ions and release the calcium and magnesium ions; (6) rinsing and flushing the system to remove the loose ions and excess brine solution; and (7) returning the system to normal operation with regenerated resin beads for continued water softening.

Step by step solution

01

1. Understand the basic components of a water softener system

A typical home water softener system consists of a resin tank filled with ion-exchange resin beads, a brine tank where a salt solution is stored, and a control valve that regulates the flow of water and manages the regeneration process.
02

2. Describe how the ion-exchange process works

During normal operation, hard water enters the water softener through the control valve and flows through the resin tank. The ion-exchange resin beads are negatively charged, which allows them to attract and hold onto positively charged calcium and magnesium ions in the water. As these hard water ions are removed, they are replaced with sodium ions, which are released from the resin beads. The softened water then exits the system and is distributed to the home.
03

3. Explain when regeneration is necessary

Over time, the ion-exchange resin beads become saturated with calcium and magnesium ions, reducing their effectiveness in removing these ions from the incoming water. Once the resin's capacity to remove hard water ions is exhausted, regeneration must occur to restore its effectiveness.
04

4. Describe the first step of regeneration: Brine draw

During regeneration, the control valve diverts water flow into the brine tank, where it mixes with the salt to create a highly concentrated brine solution. This brine solution is then drawn into the resin tank, where it comes into contact with the ion-exchange resin beads.
05

5. Explain the second step of regeneration: Ion exchange reversal

The high concentration of sodium ions in the brine solution displaces the calcium and magnesium ions that are attached to the resin beads. This process reverses the ion exchange that occurred during normal operation, effectively "recharging" the resin with sodium ions while releasing the calcium and magnesium ions from the resin beads.
06

6. Describe the third step of regeneration: Rinse and flush

After the ion exchange reversal, the control valve directs water flow through the resin tank to thoroughly rinse the loose calcium and magnesium ions from the resin bed. These ions, along with the remaining brine solution, are flushed out of the system through a drain.
07

7. Explain the final step of regeneration: Return to normal operation

Once the resin bed is fully rinsed and flushed, the control valve returns the water softener to normal operation. The regenerated resin beads are now ready to remove calcium and magnesium ions from incoming hard water, providing softened water for the home once again. By following these steps, the ion exchanger in a home water softener is successfully regenerated and prepared for further use.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91影视!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Lawn Care Many homeowners treat their lawns with \(\mathrm{CaCO}_{3}(s)\) to reduce the acidity of the soil. Write a net ionic equation for the reaction of \(\mathrm{CaCO}_{3}(s)\) with a strong acid.

What chemical property of an acid makes it an acid?

The use of lead(II) carbonate and lead(II) hydroxide as white pigments in paint was discontinued in the United States in 1978 because these compounds dissolved in the stomachs of young children who ingested paint chips. The \(\mathrm{Pb}^{2+}\) ions released when the compounds dissolve interfere with neurotransmissions in the brain, causing neurological disorders. Using net ionic equations, show why lead(II) carbonate and lead(II) hydroxide dissolve in acidic solutions.

Silver can be extracted from rocks using cyanide ion. Complete and balance the following reaction for this process: \(\mathrm{Ag}(s)+\mathrm{CN}^{-}(a q)+\mathrm{O}_{2}(g) \rightarrow\) \(\mathrm{Ag}(\mathrm{CN})_{2}-(a q) \quad\) (basic solution)

Gold in the Ocean About \(6 \times 10^{9} \mathrm{g}\) of gold is thought to be dissolved in the oceans of the world. If the total volume of the oceans is \(1.5 \times 10^{21} \mathrm{L},\) what is the average molarity of gold in seawater?
See all solutions

Recommended explanations on Chemistry Textbooks

Ionic and Molecular Compounds

Read Explanation

Inorganic Chemistry

Read Explanation

Kinetics

Read Explanation

Organic Chemistry

Read Explanation

Chemical Analysis

Read Explanation

Making Measurements

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.