7/31/2019 Waters composition and properties
1/17
Waters composition and
propertiesBerzpils secondary school
Latvia
2011
7/31/2019 Waters composition and properties
2/17
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.
7/31/2019 Waters composition and properties
3/17
WATER
RESOURCES
FRESH
WATERSALT-WATER
GALCIERRIVERS and LAKES
UNDERGRAUND
WATER
OCEANS
SALT-LAKES
MINERAL SPRING
7/31/2019 Waters composition and properties
4/17
Drinking water production inLatvia
Well water
Mineral water
Sparkling Bottled water
Artesian water
7/31/2019 Waters composition and properties
5/17
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.
7/31/2019 Waters composition and properties
6/17
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
7/31/2019 Waters composition and properties
7/17
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.
7/31/2019 Waters composition and properties
8/17
Water suplly system in our town (Berzpils):
artesian bore40 m deep, water tower and
water suplly sistem.
7/31/2019 Waters composition and properties
9/17
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.
7/31/2019 Waters composition and properties
10/17
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.
7/31/2019 Waters composition and properties
11/17
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)
7/31/2019 Waters composition and properties
12/17
The main water users are industry (23%),
municipal economy and agriculture (69%)
7/31/2019 Waters composition and properties
13/17
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.
7/31/2019 Waters composition and properties
14/17
Berzpils Fe (ferum) substance in thewater (mg/l)
from 2005 to 2009 years.
7/31/2019 Waters composition and properties
15/17
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.
7/31/2019 Waters composition and properties
16/17
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.
7/31/2019 Waters composition and properties
17/17
Thank youfor
your attention!