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The D-And-f-Block Elements

Question

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How would you convert potassium dichromate to potassium chromate?

Solution

i)When the aqueous solution of potassium dichromate is treated with calculated amount of KOH, potassium chromate is formed.

K₂Cr₇O₇ + 2KOH → 2K₂CrO₄ + H₂O

ii) When an alkali is added to an orange red solution containing dichromate ions, a yellow solution is obtained due to the formation of chromate ions.

K₂Cr₂O₇ + K₂CO₃ → 2 K₂CrO₄ + CO₂

Some More Questions From The d-And-f-Block Elements Chapter

On what ground can you say that scandium (Z = 21) is a transition element but zinc (Z = 30) is not?

The outer electronic configuration of copper is 3d¹⁰ 4s¹, yet it is considered transition element. Why?

Why the melting points of transition elements are high?

Why Zn, Cd and Hg are not regarded as transition elements?

Name the first element of 3rd transition series.

Though copper, silver and gold have completely filled sets of d-orbitals yet they are considered as transition metals. Why?

Why are transition elements so named?

Why are transition elements known as d-block elements?

Write the general electronic configuration of d-block elements.

Why do some exceptions to the general electronic configuration of d-block elements exists?

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