Name the method used to balance a chemical equation. 3marks q
Answers
There are two methods to balance chemical equation →
oxidation number method
Half reaction method
(i) Write the symbols or the formulae of the reactants on the left hand side, with a (+) sign between them.
(ii) Write the symbols or the formulae of the products on the right hand side, with a (+) sign between them.
(iii) Put the sign of an arrow (→) in between the reactant side and the product side.
(iv) It represent the reactants and the products in their molecular forms [because their atomic forms are usually neither stable nor capable of separate existence .
A chemical equation tells us what substances enter a given reaction (REACTANTS) and what substances are formed as a result of the reaction (PRODUCTS).
Answer:
A balanced equation is an equation for a chemical reaction in which the number of atoms for each element in the reaction and the total charge is the same for both the reactants and the products. In other words, the mass and the charge are balanced on both sides of the reaction.
Examples of Unbalanced and Balanced Equation
An unbalanced chemical equation lists the reactants and products in a chemical reaction but doesn't state the amounts required to satisfy the conservation of mass. For example, this equation for the reaction between iron oxide and carbon to form iron and carbon dioxide is unbalanced with respect to mass:
For example, this equation for the reaction between iron oxide and carbon to form iron and carbon dioxide is unbalanced with respect to mass:
Fe2O3 + C → Fe + CO2 The equation is balanced for charge because both sides of the equation have no ions (net neutral charge).The equation has 2 iron atoms on the reactants side of the equation (left of the arrow) but 1 iron atom on the products side (right of the arrow). Even without counting up the quantities of other atoms, you can tell the equation isn't balanced.
The balanced equation is:
2 Fe2O3 + 3 C → 4 Fe + 3CO2