The Mohs scale of hardness arranges ten common minerals order of increasing hardness and each is assigned a number: 1, talc; 2, gypsum; 3, calcite; 4, fluorite; 5, apatite; 6, orthoclase (feldspar); 7, quartz; 8, topaz; 9, corundum; and 10, diamond. Hardness of minerals is defined as the resistance of the smooth surface of a mineral to scratching. A soft surface is scratched more easily than a hard surface; so a hard mineral, such as diamond, will scratch a soft mineral, such as graphite, and the hard mineral will not be scratched by the soft. Hardness of metals is determined by impressing a small ball or cone of a hard material into the surface to be tested and measuring the size of the indentation. Hard metals are indented less than soft metals. This is known as the Brinell test
by scaling...it is the mohs hardness scale....
you can take a chemical test. Most pool suppliers sell test kits that will measure this.
You can use Moh's Hardness Scale.
EDTA or AA
lake water is soft we have some by are cottage which we swim in the seaweed and smooth rocks help it to be soft i have to say interesting question
Tap water with lots of dissolved limestone is hard. If the calcium ions are replaced with sodium ions it is said to be soft. To determine if your tap water is hard, you can test it by using tincture of green soap. The softer the water, the more the foam. See the attached link.
soft
The alkaline water is a hard water - otherwise it is soft
i think its hard
salt
hard water can be converted to soft water by boiling, filteration etc.
Hard water has more calcium than soft water does
lake water is soft we have some by are cottage which we swim in the seaweed and smooth rocks help it to be soft i have to say interesting question
it is soft water
Tap water with lots of dissolved limestone is hard. If the calcium ions are replaced with sodium ions it is said to be soft. To determine if your tap water is hard, you can test it by using tincture of green soap. The softer the water, the more the foam. See the attached link.
Because hard water is better than soft water for drinking
It depends on what area you live in whether your water is hard or soft, hope that helps :)
Soft water is used in all industries and for drinking; hard water can be used in agriculture.
soft water easily lather witth soap but hard water do not.
soft
Soft water is better solvent