You think probable to hard water.
Hard water has high concentrations of Ca2+ and Mg2+ ions dissolved in it. Boiling the water causes these ions to come out of the water as lime scale. However it does not remove all the ions causing hard water. To do this you need to pass the water though a 'de-ionising' filter.
When sugar is dissolved in water, water is called a SOLVENT
It is called a solute, which is dissolved in a solvent
The water is called solvent, the compounds to be dissolved are solutes
Deionised water has had minerals removed, so it is less likely to form limescale when boiled compared to regular tap water. However, other factors such as temperature, exposure time, and impurities in the water can still contribute to limescale formation.
Carbon Dioxide.
Limescale is primarily caused by the accumulation of calcium carbonate and other mineral deposits from hard water, which contains high levels of dissolved minerals like calcium and magnesium. When hard water is heated or evaporates, these minerals precipitate out and form solid deposits. Limescale commonly builds up in appliances such as kettles, boilers, and pipes, leading to reduced efficiency and potential damage over time. Regular descaling can help mitigate its effects.
Another name for limescale in kettles is calcium deposits.
Limescale is produced when hard water containing minerals like calcium and magnesium evaporates, leaving behind deposits on surfaces such as pipes, faucets, and appliances. These deposits build up over time and form limescale, which can decrease the efficiency of appliances and plumbing systems.
Dissolved minerals are usually in the form of ions. Therefore water that is free of dissolved minerals is called deionized water.
Bottled water can contain limescale, which is primarily composed of calcium and magnesium minerals, depending on its source. If the water is spring water or mineral water that naturally contains these minerals, it may have some level of limescale. However, purified bottled water, such as distilled or reverse osmosis water, typically has very low levels of these minerals and therefore less limescale. Always check the label for specific mineral content if you're concerned.
It is called a soluble