Chemistry key terms ch 3

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cdeelah
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102061
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Chemistry key terms ch 3
Updated:
2011-09-16 00:24:18
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key terms
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ch 3 key terms
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  1. reacants
    The are the left hand side of a chemcial equation
  2. products
    they are on the right hand side of a chemical equation
  3. the law of conservation of matter
    it is one of the most fundamental laws of nature, matter is neither created nor destroyed.
  4. Stoichiometry
    the study of quantitative relationships between the amounts of reactants and the products in a chemical reaction
  5. Stoichiometric coefficients
    the numbers placed in front of each species to balance a chemical equation
  6. aqueous solution
    Reactions that occur in water
  7. solvent vs solutes
    solvent - in any solution, the component present in greater amounts - usually much greater amounts.

    solutes - minor components of the solution
  8. concentration
    a measure of the relative quantities of solute and solvent in a solution
  9. solubility
    the ability of a compound to dissolve in the solution. It can be expressed in terms of the maximum amount of solute for a given amount of solvent at a particular temperature
  10. electrolyte
    a substance that ionizes or dissociates in water to produce an aqueous solution that conducts electricity
  11. nonelectrolyte
    substances whose solution do not conduct electricity
  12. Strong electrolytes
    they dissociate completely, so that only individual ions are present in the solution, with virtually no intact molecules
  13. weak electrolytes
    dissociate only partially; their solutions contain both intact molecules and individual ions in measurable quantities
  14. dissociation reaction
    chemical reaction in which an ionic solid dissovles in water and dissociates into its constituent (being apart of a whole) ions
  15. molecular equation
    Chemical equation in which all substances are shown as molecular formulas
  16. total ionic equation
    a chemical equation in which all ions and molecules present in solution, including spectator ions, are shown
  17. spectator ions
    ions that are present in a solution but do not actively participate in a checmial reaction
  18. net ionic equation
    a chemical equation in which those ions and molecules actually involved in the reaction are shown, but any spectator ions are omitted
  19. acid
    any substance that dissolves in water to produce H+ (or H30+) ions
  20. base
    any substance that dissolves in water to produce OH- ions
  21. Neutralization
    a checmical reaction in which an acid and a base react to produce water and salt
  22. precipitation reaction
    chemical reaction in which an insoluble solid (called the precipitate) is formed by the reaction of two ore more solutions
  23. molar mass
    the average mass of one mole of any element or compound
  24. mole ratio
  25. a stoichiometric ratio relating the number of moles of one reactant or product in a chemical reaction to the number of moles of some other reactant or product in the same reaction. Obtained from a balanced chemical equation
  26. molarity or molar concentration
    unit of concentration defined as the number of moles of solute per liter of solution
  27. elemental analysis
    experimental measurement of the mass percentage of each element in a compound
  28. green chemistry
    the philosophy that chemical process and products should be designed with the goal of reducting their environmental impacts

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