Question

according to the graph, which substance is the most soluble in water? which substance is the least soluble?

Explanation:

Step1: Analyze solubility graph

The y - axis represents grams of solute, which indicates solubility. A higher value on the y - axis means higher solubility.

Step2: Compare substances

Salt (NaCl) has a higher y - value (higher grams of solute) compared to benzoic acid (\(C_{6}H_{5}COOH\)) throughout the temperature range shown.

Answer:

The most soluble substance is salt (\(NaCl\)), and the least soluble substance is benzoic acid (\(C_{6}H_{5}COOH\)).