Chemical sedimentation can be carried out in 3 ways. Lime-soda process: In the lime-soda process, Treatment of hard water with lime (CaO or Ca(OH)2) First, then soda. During this process, the hardness is precipitated in the form of calcium carbonate or magnesium hydroxide.

What are the chemicals used in the lime soda process?

The purpose of the lime soda process is to Converts calcium and magnesium compounds to a nearly insoluble form, calcium carbonate (CaCO3) and magnesium hydroxide (Mg(OH)2). Unlike calcium carbonate, magnesium carbonate (MgCO3) does not precipitate in cold water.

How does the lime soda process soften water Describe the hot lime soda process?

Water treated with lime or combination lime and soda ash (carbonate ion). These chemicals react with the hardness and natural alkalinity in the water to form insoluble compounds. The compound precipitates and is removed from the water by settling and usually by filtration.

What are the disadvantages of the lime soda process?

Disadvantages of the lime soda process:

For efficient and economical softening, careful operation and skilled supervision when required. Dealing with large amounts of sludge (insoluble sediment) is a problem.

Why is a coagulant not required in the hot lime soda process?

2- Hot lime soda is a quick process but cold lime soda is a slow one. 3- No need for coagulant here, coagulant is required in cold lime soda process. 4- Filtration during hot lime soda is as easy as viscosity The water content is low, but it is not easy to filter in the cold process.

Introduction to Lime Soda Process – Water Treatment and Analysis – Applied Chemistry 2

19 related questions found

What is soda lime used for?

Soda lime is a mixture of chemicals used in granular form in closed breathing environments such as general anesthesia, submarines, rebreather, recompression chambers, respiratory therapy departments and xenon delivery systems, Removal of carbon dioxide from breathing gas to prevent carbon dioxide retention and carbon dioxide …

Why is lime added to water?

Lime has many applications in water treatment.This is Widely used as softener for precipitation of magnesium compounds And used to remove carbonate hardness. … if made from pure calcium carbonate, quicklime is calcium oxide. When water is added, it will ripen and generate a lot of heat.

What can remove lime from water?

Lime softening is a water treatment process that uses calcium hydroxide or lime water to remove calcium and magnesium ions. During this process, hydrated lime is added to the water to raise its pH and precipitate the ions that cause hardness.

Can you mix lime and water?

When lime is mixed with water, calcium hydroxide is formed, called hydrated lime. Calcium hydroxide reacts faster with carbon dioxide, resulting in a faster hardening mortar. Even if the reaction rate is increased, it will take many years for the mortar to fully react.

Does Lime Harden Water?

Scientists measure the hardness of water using a pH scale, which measures the concentration of hydrogen ions in a liquid. …if you have an aquarium, certain types of fish will die in hard water.one left buildup of alkaline deposits (aka lime deposits) can damage plumbing and appliances such as washing machines and dishwashers.

How long will soda lime last?

At the very least, your soda lime should be replaced every two weekseven if not used.

What does soda lime absorb?

Its pH is 13.5.Soda lime absorbs about 19% by weight carbon dioxide, so 100 g of soda lime can absorb about 26 L of carbon dioxide. The first neutralization reaction involves the formation of carbonic acid from CO2 and water.

Does soda lime release oxygen?

closed environment. The ability of soda lime to remove carbon dioxide from the air, leave oxygenmaking it an essential part of a carbon dioxide « scrubber » or rebreathing system.

Is soda lime harmful?

Soda lime absorbs carbon dioxide and water vapor and spoils rapidly unless kept in airtight containers. … One Highly corrosive poisonSoda lime can seriously damage the gastrointestinal tract and may cause death if swallowed.

How do you handle soda lime?

Disposal: Repeat the soda lime multiple times until it turns violet. Follow your school’s chemical waste disposal guidelines.If your school does not have guidelines for handling chemicals, put used soda lime in a sealed plastic bag, then put it in the trash.

What is the difference between soda lime and lime water?

Lime water is just a dilute solution of calcium hydroxide.Soda lime is about 75% calcium hydroxide, a few percent each of sodium hydroxide and potassium hydroxide, and about 20% water.

What is the principle of the soda lime test?

Soda lime test: Small amounts of organic compounds are heated intensely with soda lime (CaO + NaOH). The release of ammonia indicates the presence of nitrogen in organic compounds. Limitations: This test is not for all nitrogenous compounds. Nitro and azo compounds did not respond to this test.

Can soda lime be regenerated?

Soda lime does not regenerate. Conversely, the indicator dye changes from purple to white.

What is the color of soda lime?

Indicators for soda lime (such as ethyl violet) are colorless when freshIt is purple when used up because the pH of the particles has changed.

How do I know when to replace my soda lime?

When carbon dioxide reacts with soda water Formation of lime, heat and water, pH changes. The latter causes the indicator contained in the soda lime to change color (usually from white to pink), indicating that the absorbent is approaching the point of depletion. The absorbent should be replaced when 2/3 of the canisters are discolored.

Why is soda lime purple?

Ethyl Violet is a pH-activated color indicator that can be added to soda lime used in carbon dioxide (CO2) absorption tanks in anesthesia circuits.it turns soda lime from white to violet When the pH of the absorbent decreases due to CO2 absorption.

Is soda lime glass toughened?

Soda lime glass Also easy to temper, making the material three times stronger than non-tempered glass. This type of tempered glass can be found in car windows, shower doors, etc., as it does less damage when shattered than non-tempered glass.

Is limewater hard or soft?

high mineral water Often found in rivers and lakes used to obtain our drinking water. … However, when hard water is heated, it forms a white calcium deposit called limescale, which can cause a visible layer of limescale to form inside appliances or on the surface of hot beverages such as tea. ).

How can I lower the pH of hard water?

Without the correct water hardness, pH cannot be fixed

To soften hard water you need to use Natural « water softeners » such as Sera Super Peat. Another option is to use demineralized water for your tank.