Which material contains both covalent and ionic bonding: #A.# #K_3PO_4#; #B.# #KCl#; #C.# #H_2SO_4#; #D.# #K_2O#?

1 Answer
Dec 1, 2017

#A.# is probably the goto option....

Explanation:

You gots #K_3PO_4#, an ionic salt composed of #3xxK^+# ions, and #1xxPO_4^(3-)# ions....

The phosphate salt itself is an ionic species composed of covalently bound atoms, i.e. #O=P(-O^(-))_3#, i.e. it is the conjugate trianion of phosphoric acid, #(O=)_3P(-OH)_3#.. Of course phosphorus is bound to oxygen in a covalent interaction.