Reversible changes.Reversible reaction.Changes in General, often as a reaction, and the reaction is divided into 2 categories: 1. the reaction occurs completely (Irreversible reaction) The reaction occurs completely refers to a precursor reaction makes each reaction. The product has completely abolished the reaction when a precursor chemical compounds and reaction is not a reverse, such as burning of coal with oxygen gas in the air a lot more than enough carbon dioxide occurs. Writing represented by the equation As follows: C (s) + O2 (g) ------------> CO2 (g)Metal zinc react with haidonkhlorik acid induced gas hydrogen burning instead of the equation. As follows:Zn (s) + 2H+ (aq) -------------> Zn2+(aq) + H2 (g) 2. the reaction was incomplete. The reaction was not completely refer to the reaction that makes precursor reactions together, and at the same time. Some products do the same reaction the precursor. Make the reaction happen is incomplete. No matter how long it takes, within the system, there are still all kinds of precursor and all type of products occurred, and the system is both a reaction to the front and back of this type of reaction is called reaction that reversible reaction (Reversible reaction)
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