Answer:
hydroxide
Explanation:
Hydroxides are highly soluble in water for example KOH. Carbonates, sulfates and phosphates are insoluble or sparing soluble in water. Sulfates of calcium, barium, strontium and lead are insoluble. The other remaining sulfates are soluble. Only phosphates and carbonates of ammonium, sodium and potassium are soluble. The other remaining phosphates are insoluble.
