1.which of the two La(OH)3 & Lu(oH)3 is more basic and why??? 2.during volumetric estimation of Fe2+ or C2O42-, solution of potassium permanganate is acidified using H2SO4,why HCl is not used????

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Inorganic Chemistry> reasoning.....

1.which of the two La(OH)₃& Lu(oH)₃ is more basic and why???

2.during volumetric estimation of Fe²⁺ or C₂O₄^2-, solution of potassium permanganate is acidified using H₂SO₄,why HCl is not used????

riddhi debnath , 13 Years ago

Grade 12

3 Answers

ruchi yadav

Answer

its due to lanthanide contraction.as the size of lanthanide ions decreses frm La3+ to Lu3+ , the covalent character of the hydroxides increases and hence the basic strength decreases.La(OH)3 is most basic and Lu(OH)3 is least basic.

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Ruchi

Askiitians Faculty

Last Activity: 11 Years ago

PERUMAL

its due to lanthanide contraction.as the size of lanthanide ions decreases frm La3+ to Lu3+ , the covalent character of the hydroxides increases and hence the basic strength decreases.La(OH)3 is most basic and Lu(OH)3 is least basic.

Last Activity: 11 Years ago

Mohd Talha

Since ionic size decrease from La³+to Lu³+ the basic character of hydroxides decreases from La(OH)3 to Lu(OH)3. Thus, La(OH)3 most basic while Lu(OH)3 is least basic.

Last Activity: 7 Years ago