# Does calcium nitrate decahydrate dehydrate or decompose upon heating to 100 degrees Celsius? [closed]

Consider a sample of $$\ce{Ca(NO3)2.10H2O}$$. To remove water, I need to heat it to $$\pu{100 ^\circ C},$$ but will this high temperature decompose it or will I get the anhydrous salt?

• This information is readily available on the internet, e.g. Wikipedia. – DrMoishe Pippik Dec 31 '19 at 4:06
• Are you sure it's a calcium nitrate decahydrate and not a tetrahydrate? Or are you asking about ammonium calcium nitrate decahydrate? – andselisk Dec 31 '19 at 7:35

Calcium nitrate exists under three forms : 1) $$\ce{Ca(NO3)}_2$$ which melts at 361°C; 2) $$\ce{Ca(NO3)}_2·\ 3 \ce{H_2O}$$, which is not commercial and melts at 51°C ; 3) $$\ce{Ca(NO3)}_2·\ 4 \ce{H_2O}$$ which is commercially available and melts at 43°C. It looses its water at 132°C and is deliquescent. The decahydrate that you mention does not exist.