What is the atomicity of ca oh 2?
1 answer(s)
Right, let's look at the formula, Ca(OH)₂. You just need to count all the atoms in one molecule. You have one Calcium atom, which is the Ca. Then you have the (OH) part. The small 2 outside the bracket means you have two of everything inside it. So, that gives you two Oxygen atoms and also two Hydrogen atoms. If you add them all up, you get 1 Calcium + 2 Oxygen + 2 Hydrogen. That makes 5 atoms in total. So the atomicity of calcium hydroxide is 5. Hope that makes sense for you.