Question

Patrick did an experiment to study the solubility of two substances. He poured 100 mL of water at 20 °C into each of two beakers labeled A and B. He put 60 g of Substance A in the beaker labeled A and 60 g of Substance B in the beaker labeled B. The solution in both beakers was stirred for 1 minute. The amount of substance left undissolved in the beakers was weighed. The experiment was repeated for different temperatures of water and the observations were recorded as shown.
Experimental Observations
Substance Mass of Undissolved Substance at Different Temperatures (gram)
20 °C 40 °C 60 °C 80 °C
A 18 14 10 5
B 60 60 60 60


Part 1: Which, if any, substance is soluble in water?
Part 2: Explain how the data helped you determine solubility for both substances for temperatures 20 °C to 80 °C. (8 points)

Answer 1

Based on the results obtained;

• Solute A is solute in water
• A graph of the amount of solute dissolved against temperature helped to determine solubility for both substances for temperatures 20 °C to 80 °C.

What is the solubility of a substance?

The solubility of a substance of substance is the amount of that substance that dissolves in a given volume of solution or solvent.

The solubility of substances vary from one substance to another,

Some factors that affect the solubility of substances include:

• temperature - the solubility of solids generally increases with temperature while the solubility of gases decrease with temperature and vice versa

• pressure - the solubility of gases increase with increase in pressure and vice versa
• nature of substance -some solutes generally have higher solubilities than others in a given solvent.
• nature of solvent - based on the principle of like dissolves like, polar solutes dissolve in polar solvents whereas non-polar solute dissolve better in non-polar solvents.

Learn more about solubility at: brainly.com/question/24057916

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