determine the exact molarity of the solution of oxalic acid volumetrically

Question 1

what is primary solution? Give some examples of primary standards?

Answer 1

reagent that is extremely pure and stable, no water of hydration and have high molecular weight e.g. NaCL, Zinc, KBrO3

Question 2

why should the lower meniscus of the colorless liquid noted while taking reading?

Answer 2

the reading is accurate when we observe reading from lower meniscus

Question 3

why sodium hydroxide has corrosive action on the skin?

Answer 3

NaOH is a strong alkaline and can burn skin as skin is very delicate, thin and light

Question 4

how many molecules are present as the water of crystallization in oxalic acid?

Answer 4

2

Question 5

differentiate between strong acid and weak acid

Answer 5

STRONG ACID
-ionizes completely in aqueous solution
-strongly corrosive

WEAK ACID
-ionizes partially in aqueous solution
-less corrosive

Question 6

why is an indicator used in titration?

Answer 6

to find out the point of equivalence when a particular solution have reached the point of neutralization

Question 7

what is meant by titration?

Answer 7

a technique where standard solution of known concentration is used to determine the concentration of unknown solution

Question 8

what is common name of sodium hydroxide?

Answer 8

caustic soda

Question 9

write a balanced chemical equation for the reaction that takes place during standardization of oxalic acid?

Answer 9

C2H204 + 2NaOH——-> Na2C2O4+ 2H20