Q. Why a titration flask should not be rinsed?

Ans.     During rinsing some solution will remain sticking to the titrating flask, so pipetted volume will increase.

Q. What is end point?

Ans.     The stage during titration at which the reaction is just complete is known as end point.

Q. What is indicator?

Ans.       Indicator is a chemical substance which changes colour at the end point.

Q. What is titration?

Ans.     The process to adding one solution from the burette to another in the conical flask in order to complete the chemical reaction, is known as titration.

Q. What is the principal of volumetric analysis?

Ans.     It is a mode of determination of the quantity of the substance present in a given solution to trace quantitatively with a solution of another substance of known concentration

Q. What is the use of a rider?

Ans.       A rider used for weighing less than 10 mg.

Q. Why the weights should not be lifted with hand?

Ans.       This causes error in the weighing.

Q. What do you mean by calibration?

Ans.     Calibration means to check or verify the value or measurement of an apparatus.

Q. What is molarity?

Ans. The number of moles of the solute present per litre of the solution is called molarity. Or The molar concentration of a solution, the number of moles of solute per liter of solution

What is molality?

The number of moles of the solute present in 1000 grams of solvent is called molality.