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Boiling Point of Alkanes

58. Find perc...

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58. Find percentage of water in oxalic acid crystal

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1.17 g

of an impure sample of oxalic acid was dissolved and made up to

200 m L

10 m L

of this solution in acid medium required

8.5 m L

of a solution of potassium permanganate containing

3.16 g p e r l i t r e

of oxidation. Calculate the percentage purity of oxalic acid.

Q. 1.2 gm of a commercial sample of oxalic acid

H_{2} C_{2} O_{4} . 2 H_{2} O

was dissolved in 200 mL of water. If 10 mL of this sample required 8.5 mL of

\frac{N}{10} K M n O_{4},

then percentage purity of sample of oxalic acid is:

1.6 g

of pyrolusite ore was treated with

50 c m^{3}

1.0 N

oxalic acid and some sulphuric acid. The oxalic acid left undecomposed was raised to

250 c m^{3}

25 c m^{3}

of this solution when titrated with

0.1 N K M n O_{4}

32 c m^{3}

of the solution. Find the percentage of pure

M n O_{2}

in the sample and also the percentage of available oxygen.

Calculate the mass percentage of solution if 11 g of oxalic acid are dissolved in 500 mL.

Q. The mass of oxalic acid crystals

(H_{2} C_{2} O_{4} .2 H_{2} O)

required to prepare

50 m L

0.2 N

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