001609UNIT I1577225
254CB60AC5CHEMICAL REACTIONS 1F63CE5515
0044
Objective: the chemical reaction will allow the student to be familiar with the symbolic language of the chemical phenomenon produced in the laboratory and the ones described in the bibliography. He / she will be able to build the chemical equation too, including the coefficients indicating that the reaction is balanced.

1. Chemical reaction.

Objective: To apply the law of conservation of mass and two methods to balance the reaction.

Think what happens when you fry an egg? The egg has undergone a chemical change (because the egg can not longer be returned to its original form. (unlike a melted ice cube, which can be refrozen)).
A chemical reaction caused by the …ver más…

Eg. Na= 11 + Cl 17

1S2 2S2 2P6 3S1 1S2 2S2 2P6 3S2 3Px2 2Py2 3Pz1 = Na Cl

Ne = 10 e- 1S2 2S2 2P6 full no chemical reactions.

∆ Through a chemical reaction atoms have the opportunity to obtain a complete set of valence e- and become more stable.
Is it possible? Why?

Write the product and its name:

Cl + F no
H+ H yes H2 molecule
Rb + Br Rb Br Rubidium Bromide
Be + Cl BeCl2 Berilium Chloride

The addition of E in some form is often necessary to initiate a chemical reaction .
Eg.
6CO2+ 6H2O + light E C6 H12 O6+ 6O2

HW. Reaction review pag 281.

Chemical reactions are represented by sentences known as chemical equations.
As the matter is not created or destroyed but only transformed in a chemical reaction (law of conservation of matter) the number of atoms at the beginning of the reaction must be the same at the end of the reaction ∆ A chemical reaction equation contains the formulas for reactants and products as well as coefficients in front of each formula so that the number of atoms of each element must be the same of before and after a chemical reaction (for mass to remain constant).
When the law of conservation of matter is observed in a chemical reaction, it can be said that the equation is balanced.
Sometimes to give a