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Introduction To Analytical Chemistry And Separation Techniques(Chem 211) Question Paper

Introduction To Analytical Chemistry And Separation Techniques(Chem 211)

Course:Pure And Applied Sciences

Institution: Kenya Methodist University question papers

Exam Year:2013

INTRODUCTION TO ANALYTICAL CHEMISTRY AND SEPARATION TECHNIQUES (CHEM 211) 3RD TRIMESTER 2013
KENYA METHODIST UNIVERSITY
END OF 3RD TRIMESTER 2013 (DAY) EXAMINATION
FACULTY : SCIENCE & TECHNOLOGY
DEPARTMENT : PURE AND APPLIED
UNIT CODE : CHEM 211
UNIT TITLE : INTRODUCTION TO ANALYTICAL CHEMISTRY AND
SEPARATION TECHNIQUES
TIME : 2 HOUR

INSTRUCTIONS
Answer question one and any other two questions
Question One
Give a definition for the fallowing terms:-
Errors
Gravimetric
Digestion
Precision
Accuracy
Replicates
(10 marks)
With suitable examples explain determinate errors
(4 marks)
Describe a process using to calibrate
(9 marks)
Pipettes
Balances
pH meters
The following data was collected in replicate analysis of a broad sample for lead 0.752, 0.756, 0.752, 0.757 and 0.760 grams. Calculate the mean and the standard deviation for the set of data
(7 marks)
Explain ten applications of analytical chemistry in life, applied and pharmaceutical
(20 marks)

Question Two
List the steps followed in a chemical analysis
(7 Marks)
With relevant examples and differentiate classical and instrumental analytical techniques
(8 marks)
Write properties of solution that indicates an end-point of volumetric analysis
(5 Marks)

Question three
Describe the method to prepare 2.0l of 0.100M Na2CO3 (105.999 g/mol) from a primary solid
(10 marks)
A piece of silver coinage was dissolved in nitric acid. Addition of excess KCl precipitated AgCl which was collected and weighted. If 0.5g of the coin yielded 0.60g of AgCl. What is the percentage of silver in the coin?
(5 Marks)
A solution of know concentration contains 40g NaOH /L. 40 ml of this solution neutralized 50ml of HCl solution
Calculate the molarity of the acid
(2 marks)
Calculate the pH of the base
(3 Marks)

Introduction To Analytical Chemistry And Separation Techniques(Chem 211) Question Paper

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