Answer:
2H3PO4 +3Ca(OH) 2 = Ca3 (PO4) 2 +6H20
It is a physical change because you can not put it back like it was
Answer:
No
Explanation:
The same amount of matter is present before and after chemical and physical changes. Matter cannot be created or destroyed
Whether water is frozen, in a gaseous state, or is a liquid, it is still H2O. So the chemical composition does stay the same.
