When distilling tap water, why are dilute nitric acid and silver nitrate added?

The addition of dilute nitric acid makes the tap water acidic, which is the addition of silver nitrate.

After the generation of silver chloride.

Precipitation provides an acidic environment.

1. Chlorination is mostly used for tap water disinfection, and the main purpose of chlorination of public water supply is to prevent water-borne diseases.

2. Hypochlorous acid plays a major role in the whole disinfection process.

For inorganic substances that produce odors.

Hypochlorous acid can completely oxidize and disinfect it, and for living natural substances such as algae and bacteria, hypochlorous acid can penetrate the cell wall.

Oxidizing its enzyme system makes it inactive, causing the vital activity of bacteria to be hindered and die.

Tap water contains cl-, which is generally found in disinfectants, of course, it may also be in raw water, and alkalinity: bicarbonate. Of course, silver nitrate is to remove chloride ions, and the addition of dilute nitric acid is to remove alkalinity, and no other calculation can be added, because there will be precipitation of silver compounds, resulting in poor effect.

Dilute nitric acid is added to exclude the influence of other ions, and only silver ions can produce a white precipitate insoluble in dilute nitric acid with chloride ions.

AgCl tap water contains HCL and HCl, in which Cl ions are separated, and then reacted with AG ions separated by silver nitrate to form AGCL (precipitation).

Chemical Equation:

hcl+agno3=

HNO3 + AGCL (precipitate).

Ionic Equation:

ag++cl-=agCl precipitation.

There are no chloride ions in distilled water, so there will be no white precipitate in the silver nitrate solution, and there is no obvious envy side change.

The Zilun Kailai water we use is 4clo2+2H2O===4HCl+5O2 that has been detoxified by chlorine dioxide, so there is a small amount of chloride ion remaining.

Therefore, tap water will have white precipitate when it encounters silver nitrate solution.

Therefore, tap water and distilled water can be tested with a silver nitrate solution.

Silver nitrate is added to tap water and distilled water respectively, and it is the tap water that produces a white precipitate, and the distilled water that is still transparent because the tap water contains a small amount of chlorine and silver nitrate, which can produce a white precipitate (silver chloride).

Chemical formula: NaCl+Agno3--- AGCL+Nano3 (where the number represents the subscript).

Because tap water contains chloride ions, while distilled water does not contain minerals, chloride ions can produce white precipitates with silver nitrate, so silver nitrate can distinguish distilled water from tap water.

Chloride ion (Cl-) is a colorless ion-1 of chlorine that is widely present in nature. Chloride ions are the most abundant anions in living organisms and participate in a variety of biological functions through transmembrane transport and ion channels.

Uses and functions:

Chloride ions play a variety of physiological roles. Chloride channels are found in many cells, which are primarily responsible for controlling the membrane potential of cells at rest, as well as cell volume. In membrane systems, chloride ions in special neurons regulate the action of glycine and gamma aminobutyric acid.

Chloride ions are also involved in maintaining acid-base balance in the blood. The kidneys are organs that regulate the amount of chloride ions in the blood. Chloride transport disorders can lead to a number of pathological changes, the most well-known being cystic fibrosis, which results from mutations in a chloride transporter, CFTR, on the plasma membrane.

Chloride Testing:

Dilute nitric acid is added to the solution for acidification.

Add a silver nitrate solution to the solution.

If no white precipitate is generated, there are no chloride ions; If so, the precipitate is filtered and a sufficient amount of concentrated ammonia is added.

If the precipitate is insoluble, there are no chloride ions; If the precipitate dissolves, dilute nitric acid is added to it.

If there is a precipitate formed, there are chloride ions.

There are chloride ions in tap water, which will react with silver nitrate to form white silver chloride precipitate.

The tap water is sterilized with chlorine, so it contains Cl-, which can react with AgNO3 to form a white precipitate AGCL

The turbidity is due to the presence of chloride ions in tap water, and the silver ions in the stove hail and silver nitrate are changed to produce silver chloride precipitates.

The equation is: ag+

Cl-=AGCL (precipitation).