Question

simple tjtvrlon
2) Bark titvation
titration
3) Double​

Answer 1

Answer:

In a direct titration, you add a standard titrant to the analyte until you reach the end point.

In a back titration, you add an excess of standard titrant to the analyte, and then you titrate the excess titrant to determine how much is in excess.

It is often preferable to do a back titration if

one of the reactants is volatile and some might escape during the titration (e.g., NH₃)

the analyte is an insoluble salt (e.g., CaCO₃)

a particular reaction is too slow

direct titration would involve a weak acid-weak base titration (difficult to observe the end point

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