Calculate the extent of hydrolysis of 0-005 M K2CrO4 - K 2-3-1- 10 -7 for H 2 Cr O 4 -

K _ 2 CrO _ 4 added in to water. CrO _ 4 ^ 2 + H _ 2 O⟶ HCrO _ 4 ^ + OH ^ K _ b = K _ b = K _ w K _ 2 =( HCrO _ 4 ^ ) ( OH ^ ) #1 ...

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Introduction and Degree of Hydrolysis

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Question

Calculate the extent of hydrolysis of $0.005 M K_{2} C r O_{4} [K_{2} = 3.1 \times 10^{- 7}$ for $H_{2} C r O_{4}]$ .

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0.005 M

K_{2} C r O_{4}

[K_{2} = 3.1 \times 10^{- 7}

K_{2} C r O_{4};

p H

0.02 M

{C H}_{3} C O O {N H}_{4}

[K_{b} ({N H}_{3}) = 1.8 \times 10^{- 5}

K_{a} ({C H}_{3} C O O H) = 1.8 \times 10^{- 5}

H_{2} {C O}_{3}

H_{2} {C O}_{3} ⇌ H^{+} + H {C O}_{3}^{-}; K_{1} = 4.3 \times 10^{- 7}

H {C O}_{3}^{-} ⇌ H^{+} + {C O}_{3}^{2 -}; K_{2} = 5.6 \times 10^{- 11}

0.12 M

{N a}_{2} {C O}_{3}

p H

0.010 M

N a H {C O}_{3}

K_{1} = 4.5 \times 10^{- 7}

K_{2} = 4.7 \times 10^{- 11}

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