Among the different acidic transitional metal oxoanions such as Mo, V and W ( in the form of H2Mo2O7, H2WO4 and HVO3. which one contribute more acidic nature and what may be the reason?
Dear Venkatesha NJ
For d-block and f-block transitional metals , by increasing in metal molecular mass, the higher stability and acidity will be observed , therefore H2WO4 is a satable and have high acidity potential.
Within the group of Cr-Mo-W both, acidity and oxidizing potential, decreases to heavier homologues. While H2CrO4 is a strong acid (not stable), H2WO4 is stable and nearly not oxidizing. HVO3 is also unstable.
Dear Venkatesha NJ
For d-block and f-block transitional metals , by increasing in metal molecular mass, the higher stability and acidity will be observed , therefore H2WO4 is a satable and have high acidity potential.
VO3- exists at pH=7-8, at lower pH vanadium coordination number increases from 4 to 6, V10O28(6-) and finally VO2+ exist. The highest [HMo2O7]- concentration is at pH =3. You can obtain H2WO4 as a precipitate at pH=1.
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