hard water

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Antonyms for hard water

water that contains mineral salts (as calcium and magnesium ions) that limit the formation of lather with soap

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The Total Hardness of water is due to presence of cations, [Ca.
First two salts are the source of temporary hardness of water and the last two cause the permanent hardness of water.
They worked with a mentor from Northumbria Water to investigate the hardness of water from different areas in Newcastle.
Experimental research shows that the cavitation treatment changes hardness of water as presented in Fig.
Hardness: The hardness of water is due to the presence of calcium and magnesium salt.
Tables I A & B gives the analytical results for the concentrations of calcium, magnesium and hardness of water (the sum of the concentrations of calcium and magnesium) for each sample according to the location site number shown in Figure 1.