If you mean
Ca(OH)2(s) --> Ca2+(aq) + 2OH-(aq)
this is the equation for the dissolving of calcium hydroxide in water.
This reaction is called photosynthesis.
This reaction is called "metal-metal exchange reaction".
An acid plus a base will yield a salt and water in a neutralization reaction.
This is the chemical reaction for burning of propane.
The reaction is referred to as a double displacement reaction, also known as a metathesis reaction, where the cations and anions of two compounds switch places to form new compounds.
This is the net ionic equation for the formation of calcium hydroxide, Ca(OH)2 precipitate from soluble calcium ions and soluble hydroxide ions.
A Double displacement reaction or Neutralization reaction
this is an exotermic reaction
This reaction is called photosynthesis.
A and B
This reaction is called hydrolysis.
A combustion reaction
It's a chemical reaction.
No reaction
The reaction shows calcium ions (Ca2+) reacting with hydroxide ions (OH-) to form solid calcium hydroxide (Ca(OH)2) and release heat of 16.71 kJ. This reaction is exothermic, as indicated by the negative enthalpy change.
I suppose that you think to synthesis reaction.
This is an double-displacement reaction, in this case and acid-base reaction.