it can even occur with soft water the scum on the soap believe it or not is actually the scum from the cracks and crevises of your you body so shower more and no scum!
Liquid soap is a great alternative to bar soap, which can be messy - you'll always get residue in baths and showers - and less convenient to use than a liquid. Liquids are also less drying to the skin than bar soap, and there's no waste.
There are lots of liquid body and hand cleansers in pump-packs on the market, as well as refills, from plain, unscented Sorbolene-based liquids (good for allergy sufferers, generally cheaper, and very pleasant to use) to more expensive big-brand products.
Supermarkets and beauty shops sell little polyester netting-type shower 'sponges' you just pump a little liquid cleanser onto; they make the skin feel great, and just rinse clean.
When soaps are dissolved in hard water, a scum is formed due to the reaction between the soap molecules and the calcium and magnesium ions present in the water. The reaction forms insoluble calcium and magnesium salts of the fatty acids in the soap, which precipitate out as a scum. This scum is difficult to dissolve in water and can cling to surfaces, causing the typical "soap scum" seen in hard water environments.
The scum on the surface of boiling hard water is usually a buildup of mineral deposits, such as calcium and magnesium. These minerals are present in high quantities in hard water and can form a layer of scum when the water is boiled, especially if there are impurities present.
A scum forms when soap is used in hard water. This occurs because the calcium and magnesium ions in the hard water react with the soap to form insoluble salts, which precipitate out as a scum.
When soap is used with hard water, a scum is formed and it;Might damage the fabric.Makes the need of more soap for cleaning.One of the reactions involved in forming the scum is;2 C17H35CO2-Na+(aq) + Ca2+(aq) --> Ca(C17H35CO2)2(s) + 2 Na2+(aq)
Dissolved minerals in the water. In most cases it is better to water your garden with hard water instead of treated water. The plants typically like the minerals found in hard water.
The scum around the sink could be caused by hard water minerals like calcium and magnesium. When soap is used in hard water, it reacts with these minerals to form soap scum. Using a water softener or vinegar can help reduce the formation of scum.
When soap is used with hard water, a scum is formed and it;Might damage the fabric.Makes the need of more soap for cleaning.One of the reactions involved in forming the scum is;2 C17H35CO2-Na+(aq) + Ca2+(aq) --> Ca(C17H35CO2)2(s) + 2 Na2+(aq)
Most soaps contain sodium and potassium salts of fatty acids. These are water soluble compounds that help carry away oils and other water insoluble substances. Soap scum forms when these salts react with calcium and magnesium compound in the water. The newly formed calcium and magnesium salts are insoluble in water,and so forma coating on surfaces. This is more likely to happen if you have hard water, water rich in calcium and magnesium.
Hard water, which contains high levels of minerals such as calcium and magnesium, is known to produce scum when combined with soap or detergents. The minerals in hard water react with the soap to form a sticky residue that appears as scum on surfaces like dishes, bathtubs, and sinks. Using a water softener can help reduce the scum formation by removing or reducing the minerals in the water.
In water that contains a lot of calcium ions (Ca^(2+)), these ion combine with the stearate/palmate anion of soap, to form calcium palmate or calcium stearate (scum). NB Water that contains a lot of calcium ions is often known as 'hard water'. because it is difficult for soap to lather.
When hard water reacts with soap, it forms an insoluble scum due to the reaction between the calcium and magnesium ions present in the water with the soap. The calcium and magnesium ions react with the soap molecules to form calcium and magnesium salts of the fatty acids, which are insoluble and appear as white scum in the water.
One effect of soap and detergent in hard water is it will not lather as well as it does in soft water. This can affect the way the soap or detergent cleans in hard water making them less effective.