DOL 7/2/25

If a solid is sitting at the bottom of a beaker of water, how can you make it dissolve faster?

• Add more water.

• Take some of the solid out until the rest dissolves.

• Stir the water to get the solid to interact with more liquid.

• Spread out the solid evenly across the bottom so that it is not piled up.

Tags

NGSS.MS-PS1-2

Which of the following solutes would be easiest to dissolve?

• Sugar cubes

• Rock candy

• Granulated sugar

• Sugar crystals

Identify the part described in each column.

• Solute

• The substance being dissolved.

• Solution

• A mixture where one substance is dissolved in another.

• Solvent

• The substance that dissolves another substance.

The image below shows a cup of coffee. Which of the following activities would increase the rate of dissolution of the sugar into the coffee? Select TWO correct answers.

• Adding lumps of sugar to the coffee

• Stirring the sugar into the coffee

• Making sure there are no lumps in the sugar added to the coffee

• Cooling down the coffee before adding the sugar

• Adding less sugar to the coffee

You are observing a dissolution of a solute into a solvent to create a solution. The beaker you are

observing has big solid chunks of solute added to a liquid solvent. Is the dissolution likely to be fast

or slow? Why? How could you increase the rate of the reaction?

Tags

NGSS.MS-PS1-2