How Soap perform cleansing action?
Soaps and detergents perform the cleaning action because the polar parts of their molecules are water soluble due to hydrogen-bonding and non-polar parts remain outside water.
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5 States of Matter Definition
Matter: Anything which possesses mass and occupies space is called matter. States of Matter: Matter exists in 5 states. (i) Solid (More common form of matter) (ii) Liquid (Less common form of matter) (iii) Gas (Simplest form of matter) (iv) Plasma (Advanced form of matter) (v) Bose-Einstein Condensates Definition of state of matter Solid…
Liquid Crystals
The pure solids or crystalline solids melt sharply. The temperature remains constant at its melting point until all the solid melts. There are some solids which pass through turbid state before melting. These turbid phases are called liquids crystals because they can flow as liquids. They have the properties like liquids as surface tension, viscosity…
How do Hydrogen Bonding Affect Solubility?
In addition to water, ethyl alcohol (C2H5OH) also has the tendency to form hydrogen bonds. So, ethyl alcohol can dissolve in water because both can form hydrogen bonds with each other. Similarly, carboxylic acids are also soluble in water, if their sizes are small. Hydrocarbons being non-polar are not soluble in water at all, and…
Properties of Liquids
Liquids have following properties. 1. Liquids have definite volume. However, they do not have definite shape. 2. The molecules of liquids are in state of constant motion. The evaporation and diffusion of liquids is the result of their motion. 3. The densities of liquids are much greater than those of gases but are closer to…
Sublimation
The direct conversion of solid into vapour without passing through liquid state by heating is called sublimation. Explanation: Sublimation is used to purify solid substances. – Iodine, ammonium chloride, naphthalene, anthracene, and benzoic acid can sublime. A substance to be sublimed is taken in a watch glass covered with an inverted funnel. The funnel is…
Structure of Sodium Chloride
Ionic crystals depend upon the structure and the size of their ions. In the structure of NaCl each Na+ ion is surrounded by six chloride ions. The following figure shows how these ions are arranged in the crystal lattice. It is clear that Na+ ion has ten electrons while Cl– has 18 electrons. The size…
