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chap 6 Quantitative Chemistry
Terms in this set (30)
An instrument in which atoms or molecules are inoised and then accelerated; the ions are then separated according to their mass.
The atom against which the relative atomic masses of all the other atoms are measured using the mass spectrometer; one action of the carbon -12 isotope is given mass of exactly 12
Relative atomic mass (Ar) of an element
The average mass of naturally occurring atoms of the element on a scale where the carbon-12 atoms has a mass of exactly 12 units.
A shorthand method of representing chemical elements and compounds using the symbols of the elements.
Relative formula mass (Mr) of a substance
The sum kg the relative atomic masses of the elements present in a formula unit
The measure of the amount of substance in chemistry.
One mole of substance has a mass equal to its relative formula mass in grams- the amount of substance contains 6.02*10 to the power 23 atoms, molecules or formula units depending on the substance considered
The mass in grams of one mole of substance.
Giant ionic structure
A lattice held together by the electrostatic forces of attraction between positive and negative ions.
The formula for a compound which shows the simplest ratio of atoms present.
Giant molecular structure
Substance where large numbers of atoms are joined by convalent bonds forming strong lattice structure.
A formula that shows the actual number of atoms ot each element present in a molecule of the compound.
Law of conservation of mass
Matter cannot be lost or gain in a chemical reaction.
A measure of the actual yeild of a reaction.
A measure of the purity of the product from a reaction carried out experimentally.
Molar volume of a gas
One mole of any gas has the same volume under the same conditions of temperature and pressure.
A measure of how much solute is dissolved in a solvent.
The solid substance that has dissolved in a liquid to form a solution.
The liquid that dissolves the solid solute to form solution.
A practical measure of quantity of a sample found by weighing on a balance.
The physical quantity of a substance relating to the number of constituent particles present in a sample.
Formed when a substance dissolves into another substance (solvent)
The measure of the concentration of a solution in terms of the mass of the solute.
The measure of the concentration of a solution in terms of the number of moles of the solute.
A solution of known concentration.
Technique of using a neutralization reaction to identify molarity of an unknown solution.
A measure of how much solute can dissolve in a given solvent at a given temperature.
Solution that holds all the solute it can hold.
A solution that containcs as much dissolved solute as possible at a particular temperature.
A graph showing how the solubility of a substance in a solvent changes with temperature.
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