What are hydrates used for?
What are hydrates used for?
Hydrates are often used in skin care products to infuse moisture into the body. The world contains many gas hydrates, crystalline solids in which gas molecules are enclosed in structures made of water molecules. These form from very low temperatures and high pressure.
What is the most important reason for using hydrates in fire extinguishers?
What is the most important reason for using hydrates in fire extinguishers? They create foams that have high water content to help extinguish fires.
Which of the following is an example of a hydrate?
Other examples of hydrates are Glauber’s salt (sodium sulfate decahydrate, Na2SO4∙10H2O); washing soda (sodium carbonate decahydrate, Na2CO3∙10H2O); borax (sodium tetraborate decahydrate, Na2B4O7∙10H2O); the sulfates known as vitriols (e.g., Epsom salt, MgSO4∙7H2O); and the double salts known collectively as alums (M+2 …
Which application of hydrates relies on the anhydrous compound’s ability to absorb water?
Answer Expert Verified. Answer : Option A) Diaper. The main component in manufacturing of diaper is natural fibre or man made fibre both mixed, which acts as an absorber and storer of water.
Why are lithium halides covalent in nature?
Lithium halides are covalent because of the high polarization capability of lithium ion The Li+ ion is very small is size and has high tendency to distort electron cloud around the negative halide ion.
What metal hydrates salt?
lithium salts
Which of the following is an example of interstitial hydride?
CuH, FeH are examples of interstitial hydrides.
Which one is the alkaline earth metal?
Alkaline-earth metal, any of the six chemical elements that comprise Group 2 (IIa) of the periodic table. The elements are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra).
Why do alkali metals give flame test?
Alkali metals have low ionization enthalpies . Their valence electrons easily absorb energy from the flame and are excited to higher energy levels .
Which of the following metal is having least melting point?
Among the given alkali metals, Cs has least melting point.
Does alkali metals have low melting point?
The alkali metals have low melting points, ranging from a high of 179 °C (354 °F) for lithium to a low of 28.5 °C (83.3 °F) for cesium. Alloys of alkali metals exist that melt as low as −78 °C (−109 °F).
Why do alkali metals have low melting and boiling point?
Alkali Metals have lower melting and boiling Points All Group 1 elements have one electron in their outermost shell which is held very weakly by the nucleus. The increasing atomic radius means weaker forces between the atoms and so a lower melting and boiling point.
Why metals have low melting and boiling point?
It is due to weak metallic bonds which is due to bigger atomic size that is why they how low melting and boiling points.