Selina Concise Chemistry Class 10 ICSE Solutions Acids, Bases and Salts Selina Concise Chemistry Class 10 ICSE Solutions Acids, Bases and Salts Exercise Intext 1 1.(a) What do you understand by the term, acid? (b) Name the positive ion formed when an acid is dissolved in water. (c) Draw the structure of this ion. Solution 1. (a) Acids are defined as compounds which contain one or more hydrogen atoms, and when dissolved in water, they produce hydronium ions (H3O+), the only positively charged ions. (b) Hydronium ion (c) H3O+ 2.Write the ionisation reaction of sulphuric acid showing the formation of hydronium ion. Solution 2. H2SO4 + H2O ⇌ H3O+ + HSO4- HSO4- + H2O ⇌ H3O+ + SO4-2 3.Water is never added to acid in order to dilute it. Why? Solution 3. If water is added to a concentrated acid, the heat generated causes the mixture to splash out and cause severe burns. Thus, water is never added to acid in order to dilute it. 4.Define the term 'basicit...
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