Ciencias En Ingles

Hard water why is it a problem?
Clothes washed in hard water often look dingy and feel harsh and scratchy. The hardness minerals combine with some soils to form insoluble salts, making themdifficult to remove. Soil on clothes can introduce even more hardness minerals into the wash water. Continuous laundering in hard water can damage fibers and shorten the life of clothes by up to 40 percent.Soap chemical point of view/types of soap
Bathing with soap in hard water leaves a film of sticky soap curd on the skin. The film may prevent removal of soil and bacteria. Soap curd interferes withthe return of skin to its normal, slightly acid condition, and may lead to irritation. Soap curd on hair may make it dull, lifeless and difficult to manage.
Scum how is it produced?

Why water andoil don’t mix?
Water is what is known as a "polar" molecule. This means that there is unequal sharing of electrons between the hydrogen and the electronegative oxygen. This results in a slightpositive charge on the hydrogens and a slight negative on the oxygen in the bent-shaped molecule. This makes water a "polar" solvent. Therefore, only hydrophilic (water-loving) substances are appreciablymiscible in water.Oils, on the other hand, are made of hydrocarbon chains. These are chains of carbon atoms bonded to hydrogens. The elements and structure of oils make them non-polar, or "hydrophobic"(water fearing)."Like dissolves like" is a adage to describe the predictable action of a particular solvent on a solute. Only polar substances dissolve in polar solvents; likewise non-polar solutesonly dissolve in non-polar solvents.
What happen when water mixed with soap?

Top water what is it?

Distilled water how is it made?
Natural water usually contains a number of microscopiccontaminants, along with dissolved minerals such as calcium and iron. One way to remove these elements from water is to boil it until it changes to steam, a process known as distillation. When this steam is...