12.How many ml of 0.3 M potassium dichromate is required for complete oxidation of 5 ml of 0.2 M SnC2O4 solution

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Q. How many mL of

0.3

K_{2} C r_{2} O_{7}

(acidic) is required for complete oxidation of

5

mL of

0.2

S n C_{2} O_{4}

solution.

(Round off to 1 decimal place)

1.5 g

of sample of impure potassium dichromate was dissolved in water and made up to

500 m L

solution.

25 m L

of this solution required iodometrically

24 m L

of a sodium thiosulphate solution.

26 m L

of this sodium thiosulphate solution required

25 m L

N / 20

solution of pure potassium dichromate. Find the percentage purity of the impure sample of potassium dichromate.

Q. 50 mL aqueous solution of

F e S O_{4}

required 12 mL of 0.2 M

K M n O_{4}

in acidic medium for complete oxidation. Calculate the molarity of ferrous sulphate solution. The reaction is:

M n O_{4}^{-} + 5 F e^{2 +} + 8 H^{+} \to M n^{2 +} + 5 F e^{3 +} + 4 H_{2} O

Q. What is volume strength of

H_{2} O_{2}

solution, whose 40 ml requires 20 ml of 0.2 M acidified

K M n O_{4}

solution for complete reaction?

30.0 mL of the given $H C l$ solution requires 20.0 mL of 0.1 M sodium carbonate solution for complete neutralisation. What is the volume of this $H C l$ solution required to neutralise 30.0 mL of 0.2 M $N a O H$ solution?

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