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Chemical equations are concise representations of chemical reactions. Reactants appear on the left side of the equation. Products appear on the right side of the equation. The states of the reactants and products are written in parentheses to the right of each compound. Coefficients are inserted to balance the equation.
Names and Formulas of Bases Bases are named like other ionic compounds. The name of a base is the name of the cation followed by the name of the anion (hydroxide). The formula of a base is written by showing the number of hydroxide ions needed to balance the positive charge on the cation.
Write the chemical names and formulas of common chemical compounds. Describe the colors and textures of common ionic compounds. Synthesize chemical compounds, and write their names and formulas. Chemical substances are described not only by unique names but also by chemical formulas.
Chemical Formula A chemical formula is a way of showing information about the atoms/ions that make up a particular chemical compound. The subscripts in the chemical formula indicate the number of each type and the ratio of the atoms/ions of each element in the chemical formula. Ionic compounds The subscripts in the chemical formula of an ionic ...
The subscripts in a chemical formula provide quantitative information about the amounts of each element in a mole of compound. In an empirical formula, the subscripts show the relative number of moles of each element; in a molecular formula, they show the actual number. Isomers are different compounds with the same molecular formula.
The first step in determining the formula of a new substance is obtaining its percentage composition. Consider analyzing the composition of C, H, and O in compounds containing these three elements. 1. A sample of known mass of the compound is burnt to get CO 2and H 2O. 2. Masses of CO 2and H 2O are related to the mases of C and H. 3.
Chemical formulas such as HClO4 can be divided into empirical formula, molecular formula, and structural formula. Chemical symbols of elements in the chemical formula represent the elements present, and subscript numbers represent mole proportions of the proceeding elements. Note that no subscript number means a subscript of 1. From a chemical ...
