When a sample of water was boiled, it lathered more readily with soap. it can be concluded that the sample most likely contained

Shushino

2 years ago

When water containing calcium hydrogentrioxocarbonate (IV), which is essentially calcium bicarbonate, is boiled, it breaks down into calcium carbonate (which precipitates out) and carbon dioxide gas. This process removes some of the hardness from the water, making it easier for soap to lather. This is why, after boiling, the water would lather more readily with soap, supporting the conclusion that the original sample most likely contained calcium hydrogentrioxocarbonate (IV). Thus, answer D is correct.