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stoic.& titrat.def.
chemistry
| Question | Answer |
|---|---|
| Mole | A mole of a substance is that amount of it which contains the Avogadro's constant number of particles |
| Avogadro's Constant | is the number of carbon atoms in exactly 12 grams of the C-12 isotope. This equals 6x10 to the power of 23 particles |
| Avogadro's Law | equal volumes of all gases measured at the same temperature and pressure contain equal numbers of molecules |
| Molar Mass | The mass of one mole of a substance is it's relative atomic mass (Ar) (or it's relative molecular mass (Mr) ) expressed in grams |
| Molar Volume | at Standard Temperature and Pressure (s.t.p) the volume of 1 mole of any gas is 22.4 liters (22,400 cm cubed ) |
| Primary standard | is a substance which can be obtained in a stable, pure and soluble solid form so that it can be weighed out and dissolved in water to give out a solution of accurately known concentration |
| Standard Solution | is a solution of accurately known concentration |
| Volumetric analysis | involves reacting together volumes of solutions |
| Titration | A laboratory procedure where a measured volume of one solution is added to a known volume of another solution until the reaction is complete. |
| Equivalence point | Stage where two solutions just react completely with each other. |
| End point | when the equivalence point is shown by the indicator |
| analyte | Is the chemical species being analyzed to determine its concentration, identity, or properties |
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