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please explain me the concept of titrations with examples

please explain me the concept of titrations with examples
 

Grade:12

1 Answers

babi
55 Points
8 years ago
Chemists have many methods for determining the quantity of a substance
present in a solution or other mixture. One common method is titration,
in which a solution of known concentration reacts with a sample contain-
ing the substance of unknown quantity. There are two main requirements
for making titration possible. Both substances must react quickly and
completely with each other, and there must be a way of knowing when
the substances have reacted in precise stoichiometric quantities.
The most common titrations are acid-base titrations. These reactions
are easily monitored by keeping track of pH changes with a pH meter or
by choosing an indicator that changes color when the acid and base have
reacted in stoichiometric quantities. This point is referred to as the equiv-
alence point. Look at the following equation for the neutralization of
KOH with HCl.
KOH(aq) HCl(aq) : KCl(aq) H
2 O(l)
Suppose you have a solution that contains 1.000 mol of KOH. All of
the KOH will have reacted when 1.000 mol of HCl has been added. This
is the equivalence point of this reaction.
Titration calculations rely on the relationship between volume, con-
centration, and amount.
volume of solution molarity of solution amount of solute in moles
If a titration were carried out between KOH and HCl, according the
reaction above, the amount in moles of KOH and HCl would be equal
at the equivalence point. The following relationship applies to this
system:
molarity
KOH volume
KOH amount of KOH in moles
amount of KOH in moles amount of HCl in moles

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