rasool083:, I'm going to try to pull together what you've been saying, without the guesses you've forced everyone else to make, and see if we can get a clearer picture of what you want.
Hi
Do you know any accelerator agent for this reaction ?
H2C2O4 + 2CaCO3 →CaC2O4 + CO2 + H2O
I need this reaction take place fast and completely.
Thanks
I don't know what an "accelerator" means in this context. That's not a chemistry term, really. That makes it hard to understand the question. If you mean catalyst, you should say "catalyst". But you only mean "catalyst" if you can use the definition of the word catalyst in a chemical sense -- something that speeds a reaction by lowering activation energy. The reaction of a carbonate and an acid is generally rapid enough, so we're still confused.
hi I am looking for a chemical agent that cause speed
Hi. That statement is nonsense. You restated the original question, using even less chemical knowledge, using even worse terminology. Like its been said a few times, this reaction should be fast enough.
CaCO3 is Stone and I want react it with stone so I can not change it. I need a compound of oxalic acid that react with CaCO3. I need a bright crystall of calcium oxalate
I need a catalyst.
OK, there are a few things wrong right here. Clearly you can't take the advice that grinding the solid will improve reaction time. OK But you want to react it with a compound of oxalic acid. But the oxalic acid isn't the problem, so how will that help? Also, a compound of oxalic acid won't react like oxalic acid. So you need a catalyst, but why, if you're changing the reactants?
CaCO3 and Oxalic acid are solid. I need a glassy material that obtain from CaCO3 like Calcium oxalate with property 1.glassy 2.shiny 3.crystall 4.high hardness
do you know any other composition like it? I need a reaction that occur fast with the base of CaCO3 and a solid acid like oxalic acid or a salt of acid like potassium oxalate. Is there any other reactions?
OK, clearly (well, as clear as it gets for me), you need a perfect crystal of calcium oxalate, and not a dry powder gradually formed from the reaction of a carbonate and oxalic acid. Turns out, that's a little bit easier to arrange. You can grow clear crystals of insoluble salts, you just start with soluble salts, and mix them, slowly diffusing them together. A good way to achieve this is to use gel media to control the diffusion. You want the following textbook -- Crystal Growth in Gel Media here's the Amazon link:
http://www.amazon.com/Crystal-Growth-Gels-Heinz-Henisch/dp/0486689158 Briefly, you'd prepare a gel, say of sodium silicate or maybe you can use an organic gel like agar or gelatin, in something like a U-shaped tube, and put reservoirs of calcium chloride and oxalic acid solutions in each side, and they'll diffuse gradually together, forming crystals where they meet ... sloooowly. Because if you want a crystal, you have to grow it slowly. If you speed up crystal formation, which you keep asking for, you get powder instead. The textbook above also explains that concept well. We all know that, so its hard to understand your purpose, when you keep asking for things that will ruin your results.
ChemBuddy | 
Chem Reddit | 
Topic: an accelerator for calsium oxalate formation (Read 12042 times)