Water of crystallization degree of hydration can be critical to the resulting chemical properties. For example, anhydrous RhCl is not soluble in water and is relatively useless in organometallic chemistry whereas RhCl•3HO is versatile. Similarly, hydrated AlCl is a poor Lewis acid and thus inactive as a catalyst for Friedel-Crafts reactions. Samples of AlCl must therefore be protected from atmospheric moisture to preclude the formation of hydrates. Crystals of hydrated copper(II) sulfate consist of [Cu(HO)] centers linked to SO ions. Copper is surrounded by six oxygen atoms, provided by two different sulfate groups and four molecules of water. A fifth water resides elsewhere
Water crisis in the Democratic Republic of the Congo the water sector. The water crisis in the DRC is impacting especially the most vulnerable groups of society, namely women and children living in poor, unplanned peri-urban areas and remote rural areas. In crowded urban centres, households often have to purchase their water at inflated prices due to high demand and supply scarcity, while unimproved water sources are used for drinking water supply in rural areas, posing significant health risks. Typically, women and children assume the main responsibility of providing water supplies for their families. Water supply scarcity transforms this process into a highly laborious and time-consuming activity, which decreases