Chem Definitions

The mass in grams of one mole of that substance.

The substance that is dissolved in water.

The substance in which another substance is dissolved, forming a solution.

The nr of moles of solute per unit volume of solution.

Is a solution of known concentration.

Is a measure of the tendency of an atom to attract a bonding pair of electrons.

Is the sharing of at least one pair of electrons by two atoms.

An equal sharing of electrons.

Is unequal sharing of electrons leading to a dipole forming.

Is the transfer of electrons and subsequent electrostatic attraction.

Is bw a positive kernel and a sea of delocalised electrons.

Is the bond occurring bw atoms within the molecules.

Is a weak force of attraction bw molecules or bw atoms of noble gases.

Is a compound containing only carbon and hydrogen atoms.

Is a series of similar compounds which have the same functional group and have the same general formula, where each member differs from a single CH2 unit.

Are compounds that have the same molecular formula but different structural formulae.

Is an atom or a group of atoms that form the centre of chemical activity in the molecule.

Is a compound in which all of the bonds bw carbon atoms are single bonds.

Is a compound in which there is atleast one double and/or triple bond bw carbon atoms.

Is the net change of chemical potential energy of the system.

Are reactions which transfer potential energy to thermal energy.

Are reactions which transfer thermal energy into potential energy.

Is the change in concentration per unit time of either a reactant or product.

Is the Minimum energy required to start a chamical reaction.

Is an unstable transition state bw the reactant and the products.

Is a substance that ➕ the rate of the reaction but remains unchanged at the end of the reaction.

Is a measure of the extent of a reaction, generally measure by comparing the amount of product against the amount of product that is possible.

When an external stress is applied to a system in chamical equilibrium, the equilibrium point will change in such a way as to counteract the stress.

Acid: is a proton (H+ ion) donor.

Base: is a proton (H+ ion) acceptor.

Is an acid that ionises almost completely in an aqueous solution.

Is a base that dissociated almost completely in an aqueous solution.

Is an acid that only ionises partially in an aqueous solution.

Is a base that only dissociates partially in an aqueous solution.

At 25 degrees Celsius : Kw = (H30+) (OH-)

Is a substance in which hydrogen of an acid has been replaced by a cation.

Is the point where an acid and base reacted so neither is in excess.

Is a reaction with water where water itself is decomposed.

Is the loss of electrons.

Is the gain of electrons.

Is a substance that accepts electrons.

Is a substance that donates electrons.

Is the electrode where oxidation takes place.

Is the electrode where reduction takes place.