Solubility Lab Pre-Lab Quiz

How would you define solute and solvent in the context of a solubility lab?

• Solute is the substance being dissolved, and solvent is the substance doing the dissolving.

• Solute is the substance that remains unchanged, and solvent is the substance that undergoes a chemical change.

• Solute is the substance doing the dissolving, and solvent is the substance being dissolved.

• Solute and solvent are interchangeable terms for the same substance.

In an experiment to test the solubility of a substance, what would be the independent variable?

• The time it takes for the substance to dissolve

• The temperature of the water used

• The color of the substance being tested

• The amount of the substance being tested

In the same experiment, what would be the dependent variable?

• The independent variable

• The control group

• The dependent variable would be the variable that is being measured or tested in the same experiment.

• The hypothesis

What is a hypothesis and how would you formulate one for a solubility experiment?

• A hypothesis is a guess based on random assumptions. For a solubility experiment, a hypothesis could be formulated by picking a random variable and predicting its effect on solubility.

• A hypothesis is a proven fact that doesn't need any testing. For a solubility experiment, a hypothesis could be formulated by stating the obvious outcome of the experiment.

• A hypothesis is a proposed explanation for a phenomenon. For a solubility experiment, a hypothesis could be formulated by predicting the effect of different variables (such as temperature, pressure, or type of solvent) on the solubility of a specific substance.

• A hypothesis is a wild idea with no basis in scientific reasoning. For a solubility experiment, a hypothesis could be formulated by making an unrealistic prediction without any evidence.

If a solute completely dissolves in a solvent, how would you interpret the solubility data?

• Low solubility

• Partial solubility

• High solubility

• No solubility

What happens to the solubility of most solids as temperature increases?

• Increases

• Decreases

• Becomes solid

• Remains the same

How does the nature of the solute and solvent affect solubility?

• The size of the solute and solvent must be the same

• It has no effect on solubility

• Like dissolves like

• Opposites attract

Explain the difference between an independent variable and a dependent variable in an experiment.

• The independent variable is the one being measured, while the dependent variable is manipulated by the researcher.

• The independent variable is not important in an experiment, while the dependent variable is the main focus.

• The independent variable and the dependent variable are the same thing, just with different names.

• The independent variable is manipulated by the researcher, while the dependent variable is the one being measured or observed.

Why is it important to have a control group in a solubility experiment?

• To make the experiment more complicated

• To waste time and resources

• To confuse the results

• To provide a baseline for comparison and ensure that any changes in solubility are due to the experimental conditions.

What is the role of temperature in the solubility of a substance?

• Temperature has no role in solubility

• Increasing temperature always decreases solubility

• Temperature can either increase or decrease solubility depending on the substance

• Temperature only affects the solubility of liquids