Chemistry

2. the point at which exactly half of the acid in the buffer solution has reacted with the titrant.
3. have a neutral electric charge
7. the positively charged particles which are present in the nucleus of an atom
8. any chemical reaction that absorbs heat from its environment.
9. a gas in which the particles (a) do not attract or repel one another and (b) take up no space (have no volume).
11. the outermost shell of the atom
12. a chemical reaction that releases energy by light or heat.
13. gain of electron
15. the point during a titration when an indicator shows that the amount of reactant necessary for a complete reaction has been added to a solution.
16. when both the reactants and products are present in concentrations which have no further tendency to change with time.
19. a reaction that involves the transfer of electrons between chemical species
20. point in titration at which the amount of titrant added is just enough to completely neutralize the analyte solution.
21. Loss of electron
23. a measure of quality of energy
24. the process of conversion of a solution into solid by converting the substance into insoluble form or by making the solution a super saturated one

1. a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.
4. the average kinetic energy of all the atoms or molecules of that substance.
5. one whose charge distribution is spherically symmetric when averaged over time
6. consists of two substances that differ only by the presence of a proton (H⁺).
10. technique where a solution of known concentration is used to determine the concentration of an unknown solution.
14. A small particle with a negative charge that is found in all atoms.
17. a substance that can accept hydrogen ions in water and can neutralize an acid.
18. When things are different at each end
22. A chemical that gives off hydrogen ions in water and forms salts by combining with certain metals.