how to find the reactant that gives and accepts a hydrogen ion

Question

 

 

I have been working hard in trying to make sure I have the chemical formula for the reactant which gives up and which accepts a hydrogen ion but I am confused if I have the base and acid mixed up.

 

 

CaO   +  H₂O     →       Ca²   +  2 OH^-

 

 

 

H20 gives up the hydrogen ion

 

CaO accepts they hyddrogen ion

Answer 1

CaO + H2O goes to Ca(OH)₂ aqueous, that is, the Calcium oxide is in an excess of water so it forms an ionic compound as above. The Ca²⁺ ions and the OH^- ions dissociate in the polar water solution. One hydrogen ion from the water binds with the oxygen in the calcium oxide and then the calcium gives up two electrons to become a calcium ion in solution, creating two hydroxide ions (OH^-) .

 

This reaction produces heat (exothermic) because the resulting ions are more stable than the oxide. Remember that water has some dissociated molecules, H+ and OH- ions normally..

 

Dorene O