Last seen: Sep 10, 2021
A strong acid is one that completely ionises in water to form a large amount of hydrogen ions whereas a weak acid only partially ionises in water and ...
(a) Organic acids are acids present in plant materials and animals. These are naturally occurring acids. A mineral acid (or inorganic acid) is an ac...
Acids react with metal oxides to form salt and water. For example: Copper (II) Oxide, a metal oxide reacts with dilute hydrochloric acid to form cop...
When an acid reacts with a base, then a salt and water are formed. When hydrochloric acid reacts with sodium hydroxide solution, then a neutralisation...
(a) When dilute hydrochloric acid reacts with sodium carbonate, then sodium chloride, carbon dioxide and water are formed. Na2CO3(s) + 2HCl(aq) → 2N...
When an acid reacts with a metal hydrogen carbonate, then a salt, carbon dioxide gas and water are formed. NaHOO3(s) + HCl(aq) → NaCl(aq) + CO2(g) +...
When a concentrated acid is added to water for preparing a dilute acid, then the heat is evolved gradually and easily absorbed by the large amount of ...
(a) When an acid reacts with a metal, then a salt and hydrogen gas are formed. Zn(s) + 2HCl → ZnCl2 + H2(g) (b) Hydrogen gas is liberated when an ...
Those substances whose smell (or odour) changes in acidic or basic solutions are called olfactory indicators. Onion and vanilla extracts are olfactory...
(a) An indicator is a ‘dye’ that changes colour when it is put in an acid or a base. The three most common indicators are: Litmus, Methyl orange an...
(a) Sour; blue; bed. (b) Water. (c) Hydrogen. (d) Olfactory. (e) Olfactory.
(a) Zn (s) + HCl (aq) → ZnCl2 + H2 (b) Na2CO3 (s) + HCl (aq) → 2NaCl(aq) + CO2 + H2O(l) (c) NaHCO3 (s) + HCl (aq) → NaCl(aq) + CO2(g) + H2O(l) (...
(a) Sulphuric acid + Zinc → Zinc sulphate + Hydrogen H2SO4 + Zn → ZnSO4 + H2 (b) Hydrochloric acid + Magnesium → Magnesium chloride + Hydrogen ...
On diluting an acid, the concentration of hydronium ions (H3O+) in it decreases.
On diluting an acid, the concentration of hydronium ions (H3O+) in it decreases.
(a) Natural source for citric acid is Lemon. (b) Natural source for oxalic acid is Tomatoes. (c) Natural source for lactic acid is Sour milk or ...
(a) Citric acid – Lemon. (b) Oxalic acid – Tomatoes. (c) Lactic acid – Sour milk or curd. (d) Tartaric acid – Tamarind.
Hydrochloric acid (HCl) and Sulphuric acid (H2SO4) are strong acids. Acetic acid (CH3COOH) and Citric acid (C6H8O7) are weak acids.
Carbon dioxide (CO2) gas is evolved during the reaction. We pass this gas through lime water which turns milky because of the CO2 passing through it. ...
When Hydrochloric acid reacts with an active metal (like zinc), we observe that gas filled bubbles are formed on the surface of the metal. Pass the ga...