Oxygen has a total of eight atoms on the left side and ten atoms on the right and is therefore not yet balanced. The equation contains two elements, phosphorus (P) and oxygen (O). It therefore satisfied the law of conservation of matter. A balanced chemical equation shows that matter is neither created nor destroyed during chemical reactions, but change from one form to another. Since the elements N and H have the same number of atoms on both sides, the chemical equation is therefore balanced. H is having six atoms on the left where it is in 3 molecules of hydrogen gas and on the right it also has six atoms in 2 molecules of ammonia gas. N has two atoms on the left where it is in a molecule of nitrogen gas and on the right hand side it also has two atoms where it is in 2 molecules of ammonia (NH 3) gas. → 2NH 3(g) there are two elements, N and H. A balanced chemical equation means that all the elements represented in the equation must have equal number of atoms on both the left and the right sides of the equation.įor example, in the chemical equation N 2(g) + 3H 2(g) To give vivid explanations of chemical reactions.įor a chemical equation to be useful, it must be balanced. To deduce quantities of energy involved in chemical processes. HCl, NaOH and NaCl are aqueous solutions (the substances are in solutions in water) while H 2O is in liquid state.Ĭhemical equations are useful in the following ways: To deduce quantities of reactants needed for reactions, or quantities of products expected from chemical reactions. Such reactions are called reversible reactions and two half arrows to either side are used.Īlso in the hydrochloric acid and sodium hydroxide reaction above, the state or phase of the reactants and the products are indicated in the chemical equation. Note that there are some reactions that can proceed both in the forward and backward direction in the same system. The direction of the reaction is shown by the forward arrow, which means that the reaction goes in one direction to produce sodium chloride and water. The mole ratio of the reactants and the products, which is the stoichiometry of the reaction is also expressed as 1:1:1:1. In the above equation, the reactants (hydrochloric acid and sodium hydroxide) and the products of the reaction (sodium chloride and water) are shown by their formulae HCl, NaOH, NaCl and H 2O respectively. It shows the direction of the reaction the state of matter in which the reactants and products are present.įor example, the chemical reaction between aqueous solution of hydrochloric acid and aqueous solution of sodium hydroxide that leads to the formation of sodium chloride and water can be expressed by the equation: It shows the chemical formulae of the reactants and the products, the mole ratios by which the reactants combine, as well as the mole ratios by which the products are formed. Please let us know how we can improve this web app.A chemical equation is the symbolic representation of a chemical reaction. calcium hydroxide + carbon dioxide = calcium carbonate + waterĮxamples of the chemical equations reagents (a complete equation will be suggested):.PhCH 3 + KMnO 4 + H 2SO 4 = PhCOOH + K 2SO 4 + MnSO 4 + H 2O.To enter an electron into a chemical equation use + H 2O.Compare: Co - cobalt and CO - carbon monoxide Always use the upper case for the first character in the element name and the lower case for the second character.Ğxamples: Fe, Au, Co, Br, C, O, N, F.Enter an equation of a chemical reaction and click 'Balance'.Instructions on balancing chemical equations:
0 Comments
Leave a Reply. |