Stoichiometry

Front 1

Define, The Mole.

Back 1

The Mole of a substance is defined as, the amount of a substance, that contains the same number of particles, as there are Carbon atoms in 12g of Carbon—12

Front 2

Define, The Relative Atomic Mass of an Element.

Back 2

The Relative Atomic Mass of an Element, is defined as, the average mass of one atom of an element, compared with the mass of one atom of Carbon—12, which is taken as 12.00 atomic mass units.

Front 3

Define the Relative Molecular Mass of a Covalent Compound.

Back 3

The Relative Molecular Mass of a Covalent Compound, is defined as, The Relative Atomic Mass of an Element, is defined as, the average mass of one molecule of a nonmetallic element or covalent compound, compared with the mass of one atom of Carbon—12, which is taken as 12.00 atomic mass units.

Front 4

Define, the Relative Formula Mass of an Ionic Compound.

Back 4

The Relative Formula Mass of an Ionic Compound, is defined as, the average mass of one Formula Unit of an Ionic compound, compared with the mass of one atom of Carbon—12, which is taken as 12.00 atomic mass units.

Front 5

State, Avogadro's Law.

Back 5

Avogadro's Law states that, equal volumes of gases, under the same conditions of temperature and pressure, contain equal numbers of particles—molecules.

Front 6

State, the value of the Avogadro's constant.

Back 6

The Avogadro's constant value is 6.02. × ten to the twenty third power, per mole.

Front 7

Define the Molar mass of an Element or Compound.

Back 7

Molar mass, of a substance is defined as, the mass of 1 mole of the substance— that is either an element or compound—expressed in grams per mole.

Front 8

Define, The Molar Volume of a Gas.

Back 8

The Molar Volume of a Gas, is defined as, the volume occupied, by 1 mole of the gas, under specific conditions of temperature and pressure.

Front 9

Give, the molar volume of a gas at s.t.p. in cubic cm³ per mole or dm³ per mole

Back 9

The molar volume, of a gas at s.t.p. is, 22,400 cm³ per mole and 22.4 dm³ per mole

Front 10

Give, the molar volume of a gas at r.t.p. in cubic cm³ per mole or dm³ per mole

Back 10

The molar volume, of a gas at r.t.p. is, 24,000 cm³ per mole and 24 dm³ per mole

Front 11

Define, the Mass Concentration of a Solution.

Back 11

Mass concentration of a solution, is defined as, the mass of a solute dissolve in 1,000 cm³ of its solution.

Front 12

Define, The Molar Concentration of a Solution

Back 12

The Molar Concentration of a solution, is defined as the number of moles of a solute, dissolved in 1,000 cm³ of its solution.

Front 13

Define, A Standard Solution.

Back 13

A Standard Solution, is defined as, a solution whose concentration is known.

Front 14

Give, two ways in which a Standard Solution can be prepared.

Back 14

1) By dissolving an accurately measured mass of solute in a know volume if solvent.

Or

2) By diluting a concentrated solution with distilled water.