Answer each of following questions:

University of Babylon / College of Pharmacy
Department of Pharmaceutical Chemistry/Analytical Chemistry
Lecture number - 12 31/12/2018
Mid – Exam 31-12-2016 Tim: 2- hours
Answer each of following questions:
Q1: Explain with example (ans-10) 10 - Marks
1-Gravimetric method. 2-Primary standard. 3- Instrumental Errors. 4- Personal Errors. 5- Precision. 6-Strong and Weak Electrolytes.
7– Retention time. 8 – Micro analytical balance. 9- The mole.
10-Application of Gravimetric methods. 11-Column.
Q2: Write balanced equations: 6 - Marks
KIO3 + KI + H2SO4 ? I2 + K2SO4+ H2O
CuSO4 + KI ? Cu2I2 + I2 + K2SO4
FeSO4 + KMnO4 + H2SO4 ? K2SO4 + MnSO4 + Fe2(SO4)3 +
H2O
Q3: Answer these exercise 9 - Marks
A – How many grams of potassium chloride, the existing (or necessary for the preparation of ) 400 ml note that the concentration of 0.85% ( w/v).
B- Calculate the molar concentration of ethanol in an aqueous solution that contains 2.30 g of C2H5OH (46.07 g/mol) in 3.50 L of solution.
C-Find the number of moles and millimoles of benzoic acid ( M = 122.1 g/mol) that are contained in 2.00 g of the pure acid.

University of Babylon / College of Pharmacy
Department of Pharmaceutical Chemistry/Analytical Chemistry
Lecture number - 12 31/12/2018
Mid – Exam 31-12-2016 Tim: 2- hours
Answer each of following questions:
Q1: Explain with example (ans-10) 10 - Marks
1-Gravimetric method. 2-Primary standard. 3- Instrumental Errors. 4- Personal Errors. 5- Precision. 6-Strong and Weak Electrolytes.
7– Retention time. 8 – Micro analytical balance. 9- The mole.
10-Application of Gravimetric methods. 11-Column.
Q2: Write balanced equations: 6 - Marks
KIO3 + KI + H2SO4 ? I2 + K2SO4+ H2O
CuSO4 + KI ? Cu2I2 + I2 + K2SO4
FeSO4 + KMnO4 + H2SO4 ? K2SO4 + MnSO4 + Fe2(SO4)3 +
H2O
Q3: Answer these exercise 9 - Marks
A – How many grams of potassium chloride, the existing (or necessary for the preparation of ) 400 ml note that the concentration of 0.85% ( w/v).
B- Calculate the molar concentration of ethanol in an aqueous solution that contains 2.30 g of C2H5OH (46.07 g/mol) in 3.50 L of solution.
C-Find the number of moles and millimoles of benzoic acid ( M = 122.1 g/mol) that are contained in 2.00 g of the pure acid.

University of Babylon / College of Pharmacy
Department of Pharmaceutical Chemistry/Analytical Chemistry
Lecture number - 12 31/12/2018
Mid – Exam 31-12-2016 Tim: 2- hours
Answer each of following questions:
Q1: Explain with example (ans-10) 10 - Marks
1-Gravimetric method. 2-Primary standard. 3- Instrumental Errors. 4- Personal Errors. 5- Precision. 6-Strong and Weak Electrolytes.
7– Retention time. 8 – Micro analytical balance. 9- The mole.
10-Application of Gravimetric methods. 11-Column.
Q2: Write balanced equations: 6 - Marks
KIO3 + KI + H2SO4 ? I2 + K2SO4+ H2O
CuSO4 + KI ? Cu2I2 + I2 + K2SO4
FeSO4 + KMnO4 + H2SO4 ? K2SO4 + MnSO4 + Fe2(SO4)3 +
H2O
Q3: Answer these exercise 9 - Marks
A – How many grams of potassium chloride, the existing (or necessary for the preparation of ) 400 ml note that the concentration of 0.85% ( w/v).
B- Calculate the molar concentration of ethanol in an aqueous solution that contains 2.30 g of C2H5OH (46.07 g/mol) in 3.50 L of solution.
C-Find the number of moles and millimoles of benzoic acid ( M = 122.1 g/mol) that are contained in 2.00 g of the pure acid.