Chemistry Questionare 2?

Question

a) The steps on titration to prepare the salt solution sulphate are given below. Arrange the following steps in order from 1-8.

__ The volume of sodium hydroxide that has been recorded previously is added to the dilute sulphuric acid.

__ Add 2-3 drops of an indicator to the sulphuric acid in the conical flask.

__ The experiment is now repeated. 25.0cm³of dilute sulphuric is transferred into a conical flask, but no indictor is added.

__ Dilute sodium hydroxide is added drop wise to the sulphuric acid with swivelling, until the indicator changes colour.

__ Measure 25.0 cm³ of dilute sulphuric acid and transfer it into a conical flask.

__ The conical flask containing a pure solution of sodium sulphate is heated to evaporate most of the water and the salt if obtained by crystallisation.

__ The volume of sodium hydroxide added from the burette to the dilute sulphuric acid is recorded.

__ Dilute sodium hydroxide is added to a burette.

Answer 1

a) The steps on titration to prepare the salt solution sulphate are given below. Arrange the following steps in order from 1-8.

_6_ The volume of sodium hydroxide that has been recorded previously is added to the dilute sulphuric acid.

_3_ Add 2-3 drops of an indicator to the sulphuric acid in the conical flask.

_7_ The experiment is now repeated. 25.0cm³of dilute sulphuric is transferred into a conical flask, but no indictor is added.

_4_ Dilute sodium hydroxide is added drop wise to the sulphuric acid with swivelling, until the indicator changes colour.

_1_ Measure 25.0 cm³ of dilute sulphuric acid and transfer it into a conical flask.

_8_ The conical flask containing a pure solution of sodium sulphate is heated to evaporate most of the water and the salt if obtained by crystallisation.

_5_ The volume of sodium hydroxide added from the burette to the dilute sulphuric acid is recorded.

_2_ Dilute sodium hydroxide is added to a burette.