CLS 231 questions

Q1: Define

a)Titration

It is an analytical procedure used to determine the concentration of a sample by reacting it with a standard solution.

b)Indicator

It is any substance in solution that changes it's color as it react with either an acid or a base.

Q2: True or False

a)Back titration is one type of titration that carried out with the solution whose concentration is required to be known. (F)

b)In Mercurimetric determination of blood or urine chloride the end point is violet-blue color. (T)

c)In Volhard method we use phenolphthalein as an indicator.(F)

d)Hemolyzed blood or plasma will deproteinized by addition of sodium hydroxide. (F)

 

Q3: Write the Gravimetric Analysis Steps.

1-preparation of the solution.
2-precipitation.

3-digestion (heating).
4-filtration.

5-washing.
6-drying.

7-weighing.
8-calculation.