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Book Notes Fund H,I,J,K,L,M

Book Notes Fund H,I,J,K,L,M - Fundamental H Chemical...

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Fundamental H – Chemical Equations Chemical reactions-a chemical change in which one substance responds to the presence of another substance, to a change in temperature, or to some other influence. Chemical change-the conversion of one or more substances into different substances. Reactants-the staring materials in a chemical change. Products-the substances formed from a chemical change. Skeletal equation-an equation which shows only the reactants and products qualitatively, and not quantitatively (no coefficients). Law of conservation of mass-total mass is always constant during a chemical reaction. Chemical equation-a statement in terms of chemical formulas summarizing the qualitative information about the chemical changes taking place in a reaction and the quantitative information are neither created nor destroyed in a chemical reaction. Balanced equation-a chemical equation with the same number of atoms of each element appears on both sides of the equation. Stoichiometric coefficients-the numbers multiplying chemical formulas in a chemical equation. State symbol-a letter showing the physical state of each reactant and product. Catalyst-a substance that increases the rate of a reaction but is not itself consumed in the reaction. A balanced chemical equation symbolizes both the qualitative and the quantitative changes that take place in a chemical reaction. The stoichiometric coefficients tell us the relative numbers of moles of reactants and products taking part in the reaction. A chemical equation expresses a chemical reaction in terms of chemical formulas; the stoichiometric coefficients are chosen to show that atoms are neither created nor destroyed in the reaction. Fundamental I – Aqueous Solutions and Precipitation Soluble substance-a substance that dissolves to a significant extent in a specified solvent. Insoluble substance-a substance that does not dissolve significantly in a specified solvent. Electrolyte-a substance, which, in a solution, is present as ions.
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