an analytical process in which a standard solution in a calibrated vessel is added to a measured volume of sample until an end point, such as color change, is reached. From the volume of the sample and the volume of standard solution used, the concentration of a specific material may be calculated.
the Co3- ion.
an expression of the quantity of an undesirable material which can be removed by a water conditioner between servicing of the media, i.e., cleaning regeneration or replacement, as determined under standard test conditions. For ion exchange water softeners, the capacity is expressed in grains of hardness removal between successive regenerations and is related to the pound of salt used in regeneration. For filters, the capacity may be expressed in the length of time or total gallons delivered between servicing.
one of the principal elements making up the earths crust, the compounds of which make the water hard. The presence of calcium in water is a factor contributing to the formation of scale and insoluble soap curds which are a means of clearly identifying hard water.
A substance which releases hydrogen ions when dissolved in water.Most acids will dissolves the common metals, and will react with a base to form a neutral salt and water.