The colour of the solution becomes blue-green and the copper oxide dissolves. The blue-green colour of the solution is due to the formation of copper(II) chloride in the reaction. Acids react with metal oxides to produce a salt and water. The general reaction between a metal oxide and an acid can be written as – …
The effect of a base is nullified by an acid and vice-versa. The reaction taking place is written as – NaOH (aq) + HCl (aq) → NaCl (aq) + H2O (l) The reaction between an acid and a base to give a salt and water is known as a neutralisation reaction. In general, a neutralisation …
The reactions occurring in the above Activity are written as –Test tube A: Na2CO3 + HCl (aq) → NaCl (aq) + H2O (l) + CO2 (g)Test tube B: NaHCO3 + HCl (aq) → NaCl (aq ) + H2O (l) + CO2 (g) On passing the carbon dioxide gas evolved through lime water, Ca(OH)2 + CO2 …
How do Metal Carbonates and Metal
Hydrogencarbonates React with Acids? Read More »
The metal displaces hydrogen atoms from the acids as hydrogen gas and forms a compound called a salt.Thus, the reaction of a metal with an acid can be summarised as – Acid + Metal → Salt + Hydrogen gas The reaction that takes place can be written as follows. 2 NaOH (aq) + Zn (s) …
Litmus solution is a purple dye, which is extracted from lichen, a plant belonging to the division Thallophyta, and is commonly used as an indicator. When the litmus solution is neither acidic nor basic, its colour is purple. There are many other natural materials like red cabbage leaves, turmeric, coloured petals of some flowers such …
What is rancidity ? The spoilage of food or oxidation of food in such a way that it becomes unpleasant smell , undesirable for consumption. Food turns rancid when the fats and oils within them get oxidized and the taste and smell of the food change due to this reason. e.g.: Oil becomes rancid due …
Corrosion Iron articles are shiny when new, but get coated with a reddish brown powder when left for some time. Corrosion process in Iron is commonly known as rusting of iron. Some other metals also get tarnished in this manner. The colour of the coating formed on copper and silver are corrosion. “When a metal …
What is Oxidation? Classical concept : “The removal of hydrogen or any other electropositive element, or the addition of oxygen or , electronegative element, is said to be the process of oxidation . “ The process of loss of one or more electrons is known as oxidation, according to the electronic concept. What is Reduction? …
What is a Displacement Reaction ? “ The one atom or a set of atoms is displaced by another atom in a molecule is called displacement Reaction .” A + BC → AC + B The above equation , when A is more reactive than B. A and B have to be either:where in C …
What is a Decomposition Reaction ? Those chemical reaction in which one reactant breaks down into two or more products is called decomposition reaction. General example of a decomposition reaction. AB → A + B Where A & B are the product molecules and AB is the reactant molecule. Types of Decomposition reaction Thermal decomposition …
