[rghoddoosi]

Hello,
Could you please help me in witch reaction could I have Calcium oxalate from Calcium hydroxide?
thanks

[Dan]

You must show you have attempted the question, this is a Forum Rule.

Try googling "calcium oxalate synthesis" to get you started.

[rghoddoosi]

I dont need this reaction:
H2C2O4(aq) + 2 Ca(OH)2(s) = 2 CaOH(s) + 2 H2O(l) + 2 CO2(g)
 I know oxalic acid react with calcium carbonate to make calcium oxalate.
how it possible to make calcium oxalate from Ca(OH)2(s)

[Arkcon]

Your posted reaction is incorrect.  It doesn't occur, and produces products that don't exist.

Your posted reaction doesn't produce the products you need.  I don't understand why you posted it as an example.

Did you actually read the Forum Rules?  We're not here to dump answers for you.  Or teach you years of High School chemistry, one posting at a time, for you to make a project you're interested in.

Why not try to give us as much info as you can about what you need, what you know, and how you've tried to solve this problem for yourself.

[rghoddoosi]

excuse me.
I do not know the answer so I ask you to help me.my major is metallurgy and do not know chemestry well.
Ca(OH)2 is cement after setting. the travertine stone fill with cement and stone will polish with oxalaic acid.but oxalic acid polish only calcium carbonate but not Ca(OH)2.
if I knew the answer I never post here. I know so many thinks but never post them here if some one ask I will answer quickly.nobody know evrything

[Arkcon]

Please start by reading this old thread:

http://www.chemicalforums.com/index.php?topic=64616.0

You will learn much about calcium oxalate, and you will earn how to ask a question clearly, and completely, so that people can help you.  That poster didn't start well, but improved.  We can help you too.