The equation for the chemical (Chemical equation).The equation for the chemical (Chemical equation). The chemical equation is a chemical reaction that is written instead of the symbols, the chemical changes that occur in the system. The chemical equation, contains the precursor chemical reaction products and conditions shows that occurred with the arrow showing direction of the reaction.Precursor products.Zn (s) +2HCl(aq) ZnCl2(aq) + H2(g) The substance that is written on the left hand side of the arrow are called precursor. The substance that is written right of the arrow is called the product. Mark + refers to react. The change of the precursor to the chemical product.There are two types of chemical equations. 1. Molecular equation (equation Molecule) is the equation of a chemical reaction in which the devil set and products such as atomic or molecular shape.2NaHCO3(s) Na2CO3(s) + H2O(l) + CO2(g) 2. the equation I on (Ionic equation) is the chemical reaction equation that precursor and example 1 ion type, such as a sister or brother.H+(aq) + OH-(aq) 2H2O(l) A complete chemical equation must have the same number of atoms of each element. The left and right. Called chemical equilibriumBalancing chemical equations.How to balance chemical equations in General Specifies whether a substance is any substance as a precursor and chemical products. Write the chemical formula of precursor chemical substances and products which these formulas are not changed. Balance the equation by the numeric coefficient to find comes in front of the formula to make the same type of atom on both the left and right of the equation have the same number of times. To think that a group of Atomic ion compared to one unit. If the group does not break out ion in the reaction. Check again that the correct number of atoms of the same type by the same on both sides.EX. aluminum metal, which is a reaction to acid sensitive wong. When the aluminum will react with the acid gas hydrogen sanfiorik and aluminum sulfate Chong and the balance equation of this reaction.How to (1) write a formula and precursor substances, products, Al + H2SO4--> H2 (g) +-Al2 (SO4) 3. (2) balance the number of atoms Al 2Al + H2SO4--> H2 (g) +-Al2 (SO4) 3. (3) the balance amount of SO42-2Al + 3H2SO4 ion group —-> H2 (g) + Al2 (SO4) 3. (4) balance the number of atoms 2Al + 3H2SO4--H-> 3H2 (g) + Al2 (SO4) 3.In writing a chemical equation To write the formula of precursor chemical for each type. The chemical reaction that required one or more products which occur and write the formula of the product. When writing a chemical reaction is an equation shows, chemical equations, equilibrium. The atomic number of an element is to make all kinds of left is equal to right. By filling in the numbers in front of that substance, such as a chemical formula.N2 + H2 —-> NH3 This equation is not valid because it does not balance.-> 2NH3 N2 + 3H2 — because this equation balance. Keep in mind, that this balance in the chemical equation is the number of atoms and atomic mass Mole precursor substance is always equal to the product. Part number, or the number of molecules and molecular or mole volume of precursor may be equal or unequal, or chemical products (mostly.) In writing the equation for the chemical, if more complete should be say the State of each type, with the solid (solid), use the abbreviation "s" if it's a fluid (liquid) used the abbreviation "l" is a gas. (Gas), use the abbreviation "g", and if it is soluble in water (aqueous), use the abbreviation "aq", such as:CaC2(s) + 2H2O(g) —-> Ca(OH)2(aq) + C2H2(g) 7. write an equation, sometimes chemical reactions, energy is expressed strongly,2NH3 (g) + 93 (g) —-> N2 (g) + 3H2 (g) = power absorbed 93 kJ reaction.CH4 (g) + 2O2--> CO2 (g) +-2H2O (l) + power = 889.5 889.5 kJ the reaction to spit.Considering the nature of the atoms of the elements in the precursor or in that of the product, analysing the nature of the change. The formula of the precursor originate as bills of the classification of the product may be a chemical reaction into 3 categories as follows: Reaction to both (Combination) Chemical reaction caused by the combination of smaller molecules together into larger molecules, or caused by a chemical reaction with the chemical compound has been made. As in the following example:Example 1: in combination with the H2 O2 kaes kaes is water (H2O). 2H2(g) + O2(g) —-> 2H2O(l)Example 2:2Al (s) + 3Cl2 (g) —-> 2AlCl3.2. reaction to split "(Decomposition).Reaction to "a big molecular substances split caused by the split of small molecule compounds", as in the following example:Example 1 with water power, O2 and H2 kaes. 2H2O(l) —-> 2H2(g) + O2(g)Example 2 burnt limestone, with calcium, carbon and Hibernate (CaCO3) calcium (CaO) has been issued. And a gas site design (CO2) carbon. Burn CaCO3(s) —-> CaO(s) + CO2(g)
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