Titrations

define disproportionation

Reaction in which the same element is reduced and oxidised

percentage error calculation

tolerance/measurement x100

what to do when there are 2 measurements taken for a percentage error calculation

multiply the tolerance by the number of measurements

what reactant do you put in the conical flask?

The substance you are trying to work out

what reactant do you put in the burette?

the substance of known concentration. (the standard solution)

what reaction happens in an acid base titration

neutralisation

method to prepare a standard solution (5)

• weigh solid accurately

• dissolve the solid in less distilled water than to fill the volumetric flask

• transfer to volumetric flask and rinse after to transfer all traces of the solid

• add distilled water to the graduation line (bottom of meniscus from eye level)

• Invert to mix the solution

uncertainty calculation

(uncertainty x number of measurements) / volume x100