Topic 3 - Quantitive chemistry

What is relative formula mass(Mr)?

The sum of the relative atomic masses.

What is a mole?

One mole of a substance is the Avogadro constant number of particles (atoms, molecules, ions or formulae) of that substance.

Carbon A_r = 12

One mole of carbon weighs 12g

What is The Avogadro Constant?

6.02×10²³

What is the formula for moles?

Moles = Mass / Mr

Limiting Reactants

When a reaction stops the reactant that is fully used up is the limiting reactant.

What is the equation for the volume of a gas?

Volume of gas = (Mass of gas / Mr of gas) x 24

What is the equation for concentration?

Concentration = Mass / Volume

Concentration = Moles/Volume

Atom economy formula?

Atom economy = Relative formula mass of desired product / Mass of all reactants

Percentage Yield

Percentage yield = Mass made / Max mass

What is molar mass

The mass of one mole of a substance. The equation is:

Molar Mass = Relative formula mass * Avogadro’s number

What is Titration?

Titration is a laboratory technique used to determine the concentration of a solution by gradually adding a known concentration of another solution until a reaction is complete. This reaction is usually indicated by a color change or by reaching a set endpoint.