Please enable JavaScript.
Coggle requires JavaScript to display documents.
determine the acid concentration of a common household subsatnce/food -…
determine the acid concentration of a common household subsatnce/food
titration
titration, also known as titrimetry, is a common laboratory method of quantitative chemical analysis that is used to determine the unknown concentration of an identified analyte
concentration formula (c=n/v)
tritration for this practical will be conducted on 'citric acid' found in lemons. This process involves a certain volume of juice having a base of a known concentration added to it until a point is reached where all of the acid in the juice is neutralised
An acid-base titration is an experimental procedure used to determined the unknown concentration of an acid or base by precisely neutralizing it with an acid or base of known concentration
how to find base/acid
universal indicator
determines the pH the level of acid or base
phenolphthalein
turns light pink
methyl orange
orange to light red
litmus paper
what types of household acids
acids in substances (cleaning substances)
(strong) toilet bowl cleaner - sodium bisulfate, oxalic acid, dilute
hydrochloric acid, or dilute sulfuric acid
(strong) rust remover - acetic, citric, gluconic, levulinic, hydrofluoric,
hydroxyacetic (glycolic), or oxalic acids
(mild) tarnish removers - levulinic, acetic, hydroxyacetic (glycolic),
citric, or gluconic acids
vinegar,lemon juice, citric acid (mild acids)
choosing citiric acid as it
citric acid has a ph of 3-6 so can be relatively strong
food: apples, jelly, pineapples, cranberry sauce, yoghurt (weak)
base
Potassium hydroxide (KOH)
the concentration could be different to the one labelled
Sodium hydroxide (NaOH)
Barium hydroxide (Ba(OH)2)
sodium carbonate
can control the concentration
standard solution
make it ourselves
ph of 11 so considered a moderately strong base
creating a standard solution
used to help identify and determine the concentration of a substance whose concentration is unknown.
A standard solution can be prepared by dissolving a primary standard in a suitable solvent (such as distilled water).
able to have more control of the amount of sodium carbonate in solution therefore controlling its concentration
simple and easy to make, use for best and accurate results