19. In which set are the substances arranged in order of decreasing solubility in water? 19. In which set are the substances arranged in order of decreasing solubility in water?Al(OH)3 > Mg(OH)₂ > NaOHBaSO4 > CaSO4 > MgSO4CaCO3 > NaHCO3 > Na₂CO3AgCl>AgBr>AgI(A)E(C)(B)(D)of this substis then cooled slow20. The solubility of a substance is 60 g per 100 mL of water at 15 °C. A solution

The correct answer is B. BaSO4 > CaSO4 > MgSO4. The solubility of a substance in water is a measure of how much of the substance can dissolve in a given amount of water at a specific temperature and pressure. In general, the solubility of a substance increases as the temperature increases and decreases as the pressure increases. In the given options, the substances in set B are arranged in order of decreasing solubility in water. BaSO4 is the least soluble, followed by CaSO4, and then MgSO4, which is the most soluble. In set A, the substances are not arranged in order of decreasing solubility in water. Al(OH)3 is not very soluble in water, but Mg(OH)2 and NaOH are more soluble. In set C, the substances are not arranged in order of decreasing solubility in water, as all three silver halides are poorly soluble in water. In set D, the substances are not arranged in order of decreasing solubility in water, as all three are poorly soluble in water.Overall, the correct answer is B. BaSO4 > CaSO4 > MgSO4. These substances are arranged in order of decreasing solubility in water, with BaSO4 being the least soluble and MgSO4 being the most soluble.