Volumetric (Quantitative) Analysis Gce Revision Questions Chemistry o level

Volumetric (Quantitative) Analysis GCE Revision Questions Chemistry

1. 0.5M hydrochloric acid was run from a burette into a flask containing 25cm3 of KOK until neutralisation took place. 20cm3 of the acid were required for this experiment

a), What name is given to this type of experiment?.

b),
i) Name a suitable indicator for this experiment....

ii), What colour change would you observe to know that neutralisation has taken place?

iii) what is common in all aqueous solutions of acids that causes indicators to change colour?

iV). Why does a solution of hydrogen chloride in methyl benzene (to luene) have no effect on dry indicator papers?

c), Write an ionic equation for the reaction between the hydrochloric acid and the potassium hydroxide

d, What volume of the acid would contain one mole of HCI?

ii), How many moles of hydrochloric acid were neutralised in the experiment?

ii), What was the molarity of the aqueous KOH?

In order to determine the concentration of a solution of hydrochloric acid, a student was given 2.65g of anhydrous sodium carbonate in a beaker, 250cm3 volumetric flask, burettes, pipettes. an indicator and some distilled water.

2. a), Suggest a suitable indicator.

b). Without describing in detail, give the three main steps (in order of their execution) how a solution of sodium carbonate can be produced.

C), Determine the concentration of the sodium carbonate solution in (b) in moles per dm3

d), If 25.Ocm3 of the Na2C03 solution was neutralised by 25.0cm3 of hydrochloric acid,
Calculate the molarity of the acid in moles per dm3.

3. You are provided with 10.6g of anhydhous Na2co3, 250cm3, volumetric flask, a burette, pipette (20cm3), a beaker, an indicator and distilled water.

You are required to use these and prepare a standard solution of sodium carbonate

a), What is a standard solution?

b). 

i). State three important steps ( in order of their execution needed to prepare a standard

solution of 250cm3 of Na2CO3

ii), Determine the molarity of the acid in moles per dm3 if 20cm3 of Na2CO3 was neutralised by 20cm3 of hydrochloric acid.

C), Show how the solution in (b) (1) above could be used to determine the concentration of hydrochloric acid.

Your description should include the collection of data and interpretation
of results

Meets up with settings of the G.C.E. Ordinary Level Chemistry examination organised by the Cameroon G.C.E. Board.

Essay questions and structural questions covering the whole of Ordinary Level Chemistry Syllabus from form three to five.

Use of Chemistry revision questions. 

Above questions are revision questions for "volumetric (quantitative) analysis" for ordinary level (o level). 

Candidates can use the above questions to prepare for the Cameroon General certificate of examination board GCE chemistry.

The questions are not only for Cameroonians preparing for the G.C.E but they are revision questions for all students world wide preparing for the GCE or any other Examination.