determine the reactants and products in any kind of cg-tower.comical reaction. Transform word equations right into cg-tower.comical equations. Usage the common symbols, (left( s ight)), (left( l ight)), (left( g ight)), (left( aq ight)), and also ( ightarrow) as necessary when composing a cg-tower.comical reaction.

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The burning of fossil fuels results in the development of carbon dioxide, a greenhouse gas, and also other pollutants. This is an example of cg-tower.comistry change, in which brand-new substances space formed.In order for this come occur, the cg-tower.comistry bonds that the substances break, and also the atoms that create them separate and also rearrange us into new substances with new cg-tower.comical bonds. When this procedure occurs, we speak to it a cg-tower.comical reaction. A cg-tower.comical reaction is the procedure in i m sorry one or an ext substances are adjusted into one or an ext new substances.

Reactants and Products

To describe a cg-tower.comistry reaction, we require to indicate what building material are existing at the beginning and what building material are existing at the end. The substances that are current at the start are dubbed reactants and the substances current at the end are dubbed products.

Writing cg-tower.comistry Equations

When sulfur dioxide is included to oxygen, sulfur trioxide is produced. Sulfur dioxide and also oxygen, (ceSO_2 + ceO_2), space reactants and also sulfur trioxide, (ceSO_3), is the product.

< underbracece2 SO2(g) + O2(g) _ extReactants ightarrow underbracece2SO3(g)_ extProducts onumber>

In cg-tower.comical reactions, the reactants space found before the price "( ightarrow)" and also the products are discovered after the symbol "( ightarrow)". The basic equation because that a reaction is:

< extReactants ightarrow extProducts onumber>

There space a couple of special signs that we need to recognize in order to "talk" in cg-tower.comical shorthand. In the table listed below is the an introduction of the significant symbols supplied in cg-tower.comical equations. Table (PageIndex1) reflects a listing that symbols supplied in cg-tower.comical equations.

Table (PageIndex1): Symbols provided in cg-tower.comistry Equations SymbolDescriptionSymbolDescription
(+) used to separate multiple reaction or products (left( s ight)) reactant or product in the hard state
( ightarrow) yield sign; separates reactants from products (left( l ight)) reactant or product in the liquid state
( ightleftharpoons) replaces the yield authorize for reversible reactions that reach equilibrium (left( g ight)) reactant or product in the gas state
(oversetcePt ightarrow) formula written above the arrow is provided as a catalyst in the reaction (left( aq ight)) reactant or product in an aqueous solution (dissolved in water)
(oversetDelta ightarrow) triangle indicates that the reaction is being heated

cg-tower.comists have a choice of approaches for describing a cg-tower.comistry reaction.

1. You candraw a snapshot of the cg-tower.comical reaction reflecting the submicroscopic particles.

2. You canwrite a word equation for the cg-tower.comistry reaction:"Two molecules of hydrogen gas react with one molecule that oxygen gas to produce two molecule of water vapor."

3. Friend canwrite the equation v cg-tower.comical symbols

<2 ceH_2 left( g ight) + ceO_2 left( g ight) ightarrow 2 ceH_2O left( g ight)>

In the symbolic equation, cg-tower.comistry formulas room used rather of cg-tower.comical names because that reactants and also products, while icons are used to suggest the step of each substance.

To turn word equations right into symbolic equations, we need to follow the given steps:

determine the reactants and products. This will help you know whichsymbols go on each side of the arrow and where the (+) signs go. Write the correct formulas for all compounds. Occasionally a reactant or product is just an element (like hydrogen gas or oxygen gas). There space seven aspects that are considered diatomic, meaning that castle are always found in pairs in nature. They encompass those elements provided in the table. Table (PageIndex1): Diatomic ElementsElement NameFormula
Hydrogen Nitrogen Oxygen Fluorine Chlorine Bromine Iodine
(H_2) (N_2) (O_2) (F_2) (Cl_2) (Br_2) (I_2)

Example (PageIndex1)

Transfer the following symbolic equations into word equations or word equations right into symbolic equations.

(ceHCl left( aq ight) + ceNaOH left( aq ight) ightarrow ceNaCl left( aq ight) + ceH_2O left( together ight)) gaseous propane, (ceC_3H_8), burns in oxygen gas to develop gaseous carbon dioxide and also liquid water. Hydrogen fluoride gas reacts with an aqueous solution of potassium carbonate to create an aqueous solution of potassium fluoride, fluid water, and gaseous carbon dioxide.


a. An aqueous systems of hydrochloric acid reacts through an aqueous equipment of salt hydroxide to develop an aqueous systems of salt chloride and also liquid water.

b. Reactants: propane ((ceC_3H_8)) and also oxygen ((ceO_2))

Product: carbon dioxide ((ceCO_2)) and also water ((ceH_2O))

c. Reactants: hydrogen fluoride and potassium carbonate

Products: potassium fluoride, water, and also carbon dioxide

Exercise (PageIndex1)

Transfer the adhering to symbolic equations right into word equations or word equations into symbolic equations.

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Hydrogen gas reacts with nitrogen gas to create gaseous ammonia. Answer a (H_2 (g) + N_2 (g) ightarrow NH_3 (g))


A cg-tower.comistry reaction is the process by which one or an ext substances are readjusted into one or more new substances. cg-tower.comical reactions are stood for by cg-tower.comistry equations. cg-tower.comistry equations have actually reactants ~ above the left, an arrow that is review as "yields", and the commodities on the right.

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Henry Agnew(UC Davis)

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