chemical reaction & equations for grade x

Chemical Reactions - Chemical reactions are the processes in which new substances with new properties are formed. A chemical reaction should satisfy the following conditions: There must not be either a gain or loss of matter. There must be..

Combination Reaction The reactions in which two or more substances combine to produce a single substance are known as combination reactions or synthesis reactions. A reaction of this kind may be represented by the equation. ..

The hydrogen ions so formed diffuse through the porous pot and interact with copper sulphate forming H 2 SO 4 and Cu 2 + ions. Therefore, 2H + + CuSO 4 ------> H 2 SO 4 + Cu 2 + . The copper ions are deposited on the vessel and there is no depolarisation. The zinc rod, which is a..

We observe various chemical processes in our daily life. It is a common observation that the rates of these chemical reactions vary and depend on certain factors. The knowledge of the rate of a reaction is of importance in industries to ensure optimum p..

Stoichiometry of Chemical Reactions - A chemical reaction can be represented by a chemical equation, which may be defined as a chemical change in terms of symbols and formulae of the substances involved in the reaction. The subst..

A chemical reaction can be represented by a chemical equation, which may be defined as a chemical change in terms of symbols and formulae of the substances involved in the reaction. The substances that react among themselves to bring about the ..

Everyday experience tells us that chemical reactions take place in widely varying rates. Infact rates of various reactions vary from very slow to very fast. Some reactions are so rapid that they occur as soon as the reactants are mixed. For example, the..

Energy changes in chemical reactions can also take place in forms other than heat, such as light, electricity, mechanical energy, etc. Some common examples are: The burning of petrol or diesel in motor engines of cars, trucks, tractors or buses produces mechanical energy, whi..

When a chemical reaction occurs how are new substances produced? Do atoms of one element transform themselves into atoms of another element? Do atoms withdraw from the mixture or turn up from elsewhere? Neither of these happens; what takes place is the breaking of old bonds bet..

Introduction - There are just 26 alphabets in English language, but the number of words are innumerable. You have studied about the 115 known elements and how they are classified for systematic and comprehensive study. Thousands of compounds are born by various chemical reactions..