Keywords - Chemical Calculations

Avagadro Constant

The number of atoms, molecules or ions in a mole of any substance. There is 6.02×10^-23 of these per mole. Its units is mol.

What is a burette?

A long glass tube with a tap at one end and markings to show volumes of liquid; used to add precisely know volumes of liquids to a solution in a conical flask

What is a conical flask?

A type of laboratory flask characterized by a flat bottom, a conical body, and a cylindrical neck. It is designed for mixing and heating liquids

What is concentration

The amount of a substance dissolved into a given volume of liquid

What is concordant

When you have 2 titration results that are within 0.1cm cubed of each other. These precise results can then be used to calculate an accurate mean

What is the end point

The point in a titration where the reaction is complete and titration should stop

What is the limiting reactant

The reactant in a chemical reaction that when used up causes the reaction to stop

What is a mole

The amount of substance in the relative atomic or formula mass of a substance in grams

What is percentage yield

The actual mass of product collected in a reaction divided by the maximum mass that could have been formed in theory, multiplied by 100

What is a pipette

A glass tube used to measure accurate volumes of liquid

What is relative atomic mass (Aᵣ)

The average mass of the atoms of an element compared with carbon 12 - a given mass of exactly 12. The average mass must take into account the proportions of the naturally occurring isotopes of the element

What is relative formula mass (Mᵣ)

The total of the relative atomic masses, added up in the ratio shown in the chemical formula, of a substance

What is titration

A method for measuring the volumes of 2 solutions that react together

What is yield?

The mass of product that a chemical reaction produces