definations

Question 1

molar mass

Answer 1

mass in grams of one mole of that substance

Question 2

what is a solution

Answer 2

a homogenous mixture of solute and solvent

Question 3

solvent

Answer 3

the substance which another substance is being dissolved in

Question 4

solute

Answer 4

a substance that dissolves in a solution

Question 5

concentration

Answer 5

the amount of solute per unit volume of solution

Question 6

yeild

Answer 6

a measure of the extent of a reaction, which is measured by comparing the amount of product against the amount of product that is possible

Question 7

Exothermic reactions

Answer 7

reaction which transforms chemical potential energy into thermal energy

Question 8

endothermic energy

Answer 8

reaction which transforms thermal energy into chemical potential energy

Question 9

activation energy

Answer 9

minimum energy required to start a chemical reaction or enrgy required to form the activated complex

Question 10

activated complex

Answer 10

a high energy unstable temporary transition state between the reactant and products

Question 11

reaction rate

Answer 11

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

Question 12

catalyst

Answer 12

substance that increases the rate of the reaction but remains unhanged at the end of reaction

Question 13

ionisation

Answer 13

reaction of molecular substance with water to form ions

Question 14

dissociation

Answer 14

the splitting of ionic compound into its ions

Question 15

Amphoteric substance

Answer 15

substance that acts as either aan acid or base

Question 16

A salt

Answer 16

a substance which a hydrogen of an acid has been replaced by a cation

Question 17

Hydrolysisa

Answer 17

reaction of an ion of a salt with water

Question 18

neutrilasation

Answer 18

the point where an acid and a base have reacted so neither is in excess

Question 19

standard solution

Answer 19

solution of a know subtsance