A:BaCl2+K2SO4═BaSO4+2 KCl
B:Ba(OH)2+K2SO4═BaSO4+2 KOH
C:Ba(NO3)2+H2SO4═BaSO4+2 HNO3
D:Ba(OH)2+H2SO4═BaSO4+2 H2O
Mrs Read the cleaning every day.
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