10th Acid Base And Salt Notes 2011 Pdf Sodium Carbonate 1. common salt (sodium chloride): sodium chloride (nacl) is also known as common or table salt. it is formed after the reaction between sodium hydroxide and hydrochloric acid. it is a neutral salt. the ph value of sodium chloride is about 7. sodium chloride is used to enhance the taste of food. Neutralization reaction: an acid and a base react with each other to give salt and water. this reaction is known as the neutralization reaction. base acid → salt water. naoh (aq) hcl (aq) → nacl (aq) h 2 o (l) 5. reaction of metallic oxides with acids. metal oxide acid → salt water.
10th Acid Base And Salt Notes 2011 Pdf Sodium Carbonate For acids: ph< 7 : for bases: ph> 7 for neutral substances: ph= 7. 6. importance of ph in daily life (i) blood ph: for proper functioning, our body needs to maintain a blood ph between 7.35 to 7.45. values of blood ph greater than 7.8 or less than 6.8 often results in death. (ii) acid rain: when ph of rain water is less than 5.6, it is called. Whenever acids react with metal carbonate or metal. bicarbonate, they form respective salts, water and carbon. dioxide gas is released. example : acid metal carbonate →metal salt water carbon dioxide gas. i.e. hcl na2co3→nacl h2o co2. 4. reaction with bases: acids react with bases to form salt. and water. Base nonmetal oxide → salt water heat. 2naoh co 2 → na 2 co 3 h 2 o. 3. reaction of acids and base. a very common acid is hydrochloric acid. the reaction between strong acid, says hydrochloric acid and strong base say sodium hydroxide, forms salt and water. the complete chemical equation is shown below. Salts of strong acid and weak base are acidic, with a ph value less than 7. for example: ammonium chloride solution has ph value of 6. salts of weak acid and strong base are basic, with a ph value more than 7. for example: sodium carbonate solution has a ph value of 9. common salt chemical name: sodium chloride.
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