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It is used for manufacturing of soap, artificial silk, as laboratory reagent in textile and paper industries. It is used for manufacturing of bleaching powder, softening of hard water and neutralizing acidic soil and lakes due to acid rain. It is used in alkaline batteries. It is use as a base 10 neutralize acidity in the stomach.
It is also used for treatment of bees stings. It is used as foaming agent in fire extinguishers Q. It is used to remove grease stains from clothes. Write down its formula.
Indicators are the organic compounds. They have different colours in acidic and alkaline solutions. Litmus is a common indicator. It is red in acid and blue in alkaline solutions.
Some indicators are used as mixture. The mixture indicators give different colours at different pH values. Hence it is used to measure the pH of a solution. Such a mixed indicator is called universal indicator. Analytical chemists examine substances qualitatively and quantitatively. They indentify substances and evaluate their properties. Salts are inorganic compounds Byjus Maths Class 8 Chapter 2 You generally formed by neutralization of an acid with a base. Salts are made up of positive ions cations and negative ions Anions.
A cation is metallic and derived from a base therefore it is called basic radical. While anion is derived form acids therefore it is called acid radical. They have high melting and boiling points. Q32 Define normal or neutral salts. A salt formed by the total Class 10 Maths Ch Trigonometry Data replacement of ionizable H ions of an acid by a positive metal ion or NH ions is called normal or neutral salt.
These salts are formed by partial replacement of H ions of an acid by a positive metal ion. Basic salts are formed by the incomplete neutralization of a polyhydroxy base by an acid. Double salts are formed by two normal salts when they are crystallized from a mixture of equimolar saturated solutions.
The individual salt components retain their properties. For example Mohr's salt FeSO4. NH4 2 SO4, 6H Mixed salts contain more than one basic or acid radicals. A base is a Byjus Class 4 Maths Question Paper Video substance which turn red litmus to blue and having pH value greater than 7.
Water soluble base is called alkali but some bases are not soluble in water, so all alkalis are bases but all bases are not alkalis. Bronsted-Lowry base is a substance molecule or ion which can accept a proton H from another substance.
According to Bronsted-Lowry concept: An acid is a compound which donates a proton H. Coordinate covalent bond forms between Lewis acid and base. Because it has an empty orbital that can accommodate a pair of electrons. Sulphuric acid and nitric acid both are used in the manufacture of fertilizers0. What is the pH of pure water? Because the pH scale is Ch 8 Maths Class 10 Extra Questions And Answers logarithmic, a solution of pH has 10 times higher concentration of [H] than that of a solution of pH2 Q. Because in Na SO, there is total replacement of ionizable H ions.
While in NaHSO the partial replacement of a replaceable H" ions of an acid takes place by a positive metal ion. It turns red litmus to blue Q. There are following characteristics of salt Salts are ionic compounds found in crystalline form.
Soluble salts are recovered by evaporation or crystallization. In this method, usually solutions of soluble salts are mixed. During the reaction 5 exchange of ionic radicals i-e metallic radicals exchange with acidic radicals takes place to 6 produce two new salts. One of the salt is insoluble and other is soluble. The insoluble salt 7 precipitates solidify in solution c.
A salt is formed by the total replacement of ionizable H ions of an acid by a positive metal ion or NH ions is called normal or neutral salt. These salts are neutral to litmus. Benzoic acid is used for food preservation. Q54 Name the acids present in. Pb OH NOis a basic salt because it is formed by the incomplete neutralization of a poly hydroxyl base by an acid.
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