[some dude]

Hello,

I wanted to make calcium acetate from CaO and acetic acid. So I put 1 kg of burnt lime together with 1.5 l of acetic acid (98%) and some water. After it heavily reacted, I let it dry out and got a white powder. I thought it must be calcium acetate, but it is water insoluble. Calcium acetate would be soluble at about 300 g/l, this stuff does not dissolve at all. Does anyone know what that could be?

[chenbeier]

Do you really got CaO and not gypsum?

[some dude]

Label said burnt lime. Also, it started to boil when I was mixing it together. I thought it was because of a neutralisation reaction...

[OrganicDan96]

probably excess calcium oxide, you are not using enough acetic acid

[Borek]

probably excess calcium oxide, you are not using enough acetic acid

That would still react with water when trying to dissolve.

I agree there is not enough acetic acid.

[OrganicDan96]

probably excess calcium oxide, you are not using enough acetic acid

That would still react with water when trying to dissolve.

I agree there is not enough acetic acid.

calcium hydroxide has a solubility of 1.73 g/l at 20°C

[some dude]

Right, must be CaO/CaOH then, thanks.