Water’s composition and properties

7/31/2019 Waters composition and properties

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Waters composition and

propertiesBerzpils secondary school

Latvia

2011


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Water H2O

Water is a chemical substance with the chemicalformula H2O. Its molecule conatins one oxygen

and two hydrogen atoms connected bycovalent bonds. Water is a liquid at ambient

conditions, but it often co exists on Earth withits solid state, ice, and gaseous state, water

vapor and steam.


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WATER

RESOURCES

FRESH

WATERSALT-WATER

GALCIERRIVERS and LAKES

UNDERGRAUND

WATER

OCEANS

SALT-LAKES

MINERAL SPRING


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Drinking water production inLatvia

Well water

Mineral water

Sparkling Bottled water

Artesian water


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Spring water

Bottled water derived from anunderground formation which water

flows naturally to the surface of theearth. Spring water must be collectedonly at the spring or throught a boreholetapping the underground formationfeeding the spring. Spring watercollected with the use of an externalforce must be from the sameunderground stratum as the spring andmust have all the physical properties

before treatment, and be of the samecomposition and quality as the waterthat flows naturally to the surface of theearth.


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Well water

A water well is anexcavation or structure

created in the ground by

digging, driving, boring or

drilling to accessgroundwater in underground

aquifers

Usually 5 15 m deep

On average ph 6,8 7,3 Water composition: cation,

anion. Mg, Fe, K, Ca.

Sulphate and phosphates


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Artesian water

Bottled water from a well that taps a

confined aquifer (a water bearing

underground layer of rock and sand) in wich

the water level stands at some height above

the top of the aquifer.


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Water suplly system in our town (Berzpils):

artesian bore40 m deep, water tower and

water suplly sistem.


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Mineral water

Mineral water containing not less than 250

parts per million total dissolved solids may

be lebeled as mineral water. Mineral water

is distinguished from other types of bottled

water by its constant level and relative

proportions of mineral and trace elements at

the point of emergence from the source. Nominerals can be added to this product.


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Sparkling bottled water

Water that after treatment, and possible

replacement with carbon dioxide, contains

the same amount of carbon dioxide that it

had as it emerged from the source.

Sparkling waters may be labeled as

sparkling drinking water, sparkling mineral

water, sparkling spring water, etc.


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Mineral water types in Latvia

MANGAI (carbonated natural mineral water)

ekavas spring water (carbonated mineral water)

RASA PREMIUM (carbonated mineral water)

VENDEN ( Natural mineral water, Water from naturereserve)


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The main water users are industry (23%),

municipal economy and agriculture (69%)


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Chemical indices for drinking water

(maximum quantity):

B (boron) 1,0 mg/l;

Hg hydrargyrum 1,0 g/l;

fluoride 1,5 mg/l;

Cr chromium 50 g/l;

Cd cadmium 5,0 g/l;

Ni nickel 20 g/l;

nitrate 50 mg/l;

nitrite 0,50 mg/l;

pesticide (singly) 0,10 g/l;

Se selenium 10 g/l;

Pb plumbum 10 g/l;

Cu cuprum 2,0 g/l.


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Berzpils Fe (ferum) substance in thewater (mg/l)

from 2005 to 2009 years.


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1st took some water (pic.1)

Choose write staff and substance, to find Fe (ferum) at drink water

Water fill in to pulb (pic.2)

Water to acidify with hidrochlorid acid (pic.3)

Use school laboratory find Fe, carbonate and organic material atdrinking water.


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Add one drop watered hidrogen peroxide

Boil

Hidrogen peroxide to oxidize ferum:

2Fe2+ + H2O2 + 2H+ 2Fe 3++ 2H2O

When its come down add (amonija rodands). Parlor pink color to show us

ferum in water.

In the water also possible to find organic materials;

Fill up water into pulb and add watered sulphuric acid

Add one drop watered KMnO4

If there organic materials, lilac water color disappear.


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Thank youfor

your attention!

Water’s composition and properties

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