Question

Ca CaO Ca(OH)2 Ca3(PO4)2 H3Po4​

Answer 1

2Ca+O2=2CaO

CaO+H2O=Ca(OH)2

3Ca(OH)2+2H3PO4=Ca3(PO4)2+6H2O

Ca3(PO4)2+6HCl=3CaCl2+2H3PO4

Answer 2

The given chemical formulas represent different compounds:

1. Ca: Calcium
2. CaO: Calcium Oxide (also known as quicklime)
3. Ca(OH)2: Calcium Hydroxide (also known as slaked lime)
4. Ca3(PO4)2: Calcium Phosphate (specifically, the compound is calcium phosphate tribasic or tricalcium phosphate)
5. H3PO4: Phosphoric Acid

If you have any specific questions about these compounds or their properties, feel free to ask!