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Hamada Boiler
Hamada Boiler Group Head Office
HUARONG BUILDING ROOM 1705
3880 JIANGNAN ROAD HANGZHOU CITY,
Hangzhou, Zhejiang Province, China
Tel: +86-571-87655979, 87655989
Fax: +86-571-87655969
Data Used in Water Chemistory | Home |
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The chemicals listed in this section include those found as impurities in water and also those used as treaments. The chemical formulas, ion forms, and molecular and equivalent weights are given for each substance. Abbreviations and symbols are used extensively to simplify water analysis reports and calculations. This section explains the meanings of some common symbols and what they represent in water analyses. Very often the units used in water chemistry need to be converted back and forth for practical application. For example, parts permillion may be converted to grams per 1000 litres and vice versa. The conversion factors in this section simplify this type of calculation.

CATIONS

Ion
Formula

Ionic
Weight

Equivalent Weight

Alumunium A1+++ 27.0 9.0
Ammonium NH4+ 18.0 18.0
Calcium CA++ 40.1 20.0
Hydrogen H+ 1.0 1.0
Ferrous Iron Fe++ 55.8 27.9
Magnesium Mg++ 24.3 12.2
Manganese Mn++ 54.9 27.5
Postassium K+ 39.1 39.1
Sodium Na+ 23.0 23.0
ANIONS
Bicarbonate NCO3- 61.0 61.0
Chloride CO3- 60.0 60.0
Fluoride F- 19.0 19.0
Nitrate NO3- 62.0 62.0
Hydroxide OH- 17.0 17.0
Phosphate (tribasic) PO4-- 95.0 31.7
Phosphate (dibasic) HPO4-- 96.0 48.0
Phosphate (monobasic) H2PO4- 97.0 97.0
Sulphate SO4-- 96.1 48.0
Sulphite SO3-- 80.1 40.0
COMPOUNDS Formula Molecular
Weight
Equivalent
Weight
Alumunium hydroxide Al(OH)3 78.0 26.0
Alumunium sulphate Al2(SO4)3 342.0 57.0
Alumina Al2O3 102.0 17.0
Calcium bicarbonate Ca(HCO3)2 162.1 81.1
Calcium carbonate CaCO3 100.1 50.1
Calcium chloride CaCl2 111.0 55.5
Calcium hydroxide (pure) Ca(OH)2 74.1 37.1
Calcium hydroxide (90%) Ca(OH)2 -- 41.1
Calcium sulphate (anhydrous) CaSO4 136.2 68.1
Calcium sulphate (gypsum) CaSO4.2H2O 172.2 86.1
Calcium phosphate Ca3(PO4)2 310.3 51.7
Disodium phosphate Na2HPO4.12H2O 358.2 119.4
Disodium phosphate
(anhydrous)
NaHPO4 142.0 47.3
Ferric oxide Fe2O3 159.6 26.6
Iron oxide (magnetic) Fe3O4 321.4 -
Ferrous sulphate (copperas) FeSO4.7H2O 278.0 139.0
Magnesium oxide MgO 40.3 20.2
Magnesium bicarbonate Mg(HCO3)2 146.3 73.2
Magnesium carbonate MgCO3 84.3 42.2
Magnesium chloride MgCl2 95.2 47.6
Magnesium Mg(OH)2 58.3 29.2
Magnesium phosphate Mg3(PO4)2 263.0 43.8
Magnesium sulphate MgSO4 120.4 60.2
Monosodium phosphate NaH2PO4.H2O 138.1 46.0
Monosodium phosphate
(anhydrous)
NaH2PO4 120.1 40.0
Metaphosphate NaPO3 102.0 34.0
Sodium aluminate Na2Al2O4 164.0 27.3
Sodium bicarbonate NaHCO3 84.0 84.0
Sodium carbonate Na2CO3 106.0 53.0
Sodium cholride NaCl 58.5 58.5
Sodium hydroxide NaOH 40.0 40.0
Sodium nitrate NaNO3 85.0 85.0
Sodium sulphate Na2SO4 142.0 71.0
Sodium sulphite Na2SO3 126.1 63.0
Trisodium phosphate Na3PO4.l2H2O 380.2 126.7
Trisodium phosphate
(anhydrous)
Na3PO4 164.0 54.7
GASES
Ammonia NH3 17 --
Carbon Dioxide CO2 44 --
Hydrogen H2 2 --
Oxygen O2 32 --
ACIDS
Carbonic H2CO3 62.0 31.0
Hydrochloric HCl 36.5 36.5
Phosphoric H3PO4 98.0 32.7
Sulphuric H2SO4 98.1 49.1

 
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