Notice that anhydrous (absolute) ethanol is highly hygroscopic. You may consider to remove traces of water by using a dehydrating agent suitable for ethanol, such as Linde type 4A molecular sieve, metallic calcium, or calcium hydride.

You could simply add more ethanol then, unless the remaining solid is an insoluble impurity. Otherwise, have you considered ionic liquids? [P66614]Cl, for example.

Notice that anhydrous (absolute) ethanol is highly hygroscopic. You may consider to remove traces of water by using a dehydrating agent suitable for ethanol, such as Linde type 4A molecular sieve, metallic calcium, or calcium hydride.

Are you trying to make [Ta(OEt)x(Cl)5-x]?

I have chelated tantalum with PEI in water added with H2O2, tantalum chloride can react vigorously with water, but when it was chelated, it can stay stable for a long time.

Dear Krish Na , It is 2017 and definitely you have found the best option, would you describe it and let us know?

Reaction will be like 

 2 TaCl5 + 10 C2H5OH  = Ta2C2H5O10 + 10 HCl

I have done experiment by dissolving TaCl5 in isopropyl alcohol but the solubility of the Tacl5 is still a question for me.

It is more acidic in nature. The pH is around 2.

Can anyone share about how much TaCl5 salt is soluble in 100ml IP alcohol.?

Hi, good morning! How can I transform TaCl5 in Ta2O5? Thank you!