Aqueous Solutions

Match each term with its definition.

• Unsaturated solution

• A substance that dissolves in another substance to form a homogeneous mixture

• Solute

• A substance in which another substance is dissolved to form a homogeneous mixture

• Solvent

• The process of reducing the ratio of solute to solvent in a solution

• Concentration

• Containing less than the maximum amount of solute for a given amount of solvent at a constant temperature and pressure

• Dilution

• The measure of the amount of solute that is dissolved in a given quantity of solvent

There are 2 parts to any solution. The first is the substance that is dissolved. This is called a solute. A ​ (a)   is the substance that dissolves in another substance to make a ​ (b)   mixture. Solutes can be gases, solids, or other liquids. The second is the substance that something dissolves into. This is called a ​ (c)   . The most common solutions are ​ (d)   solution, which are any solution where the solvent is ​ (e)   .

• solute
• homogeneous
• aqueous
• water
• solvent

A ​ (a)   is the measure of the amount of solute dissolved in a solvent. An aqueous solution with ​ (b)   solute is considered a strong concentration,. There is a point where the solute stops being dissolved in a solvent. Once a substance is holding as much solute as it can, it is considered ​ (c)   . A saturated solution contains the maximuma bount of solvent at that temperature and pressure. If ​ (d)   or pressure changes, it may change how much solute can dissolve. You can also make an aqueous solution weaker by adding more water. This is called ​ (e)   , which is the process of reducing the ratio of solute to solvent.

• concentration
• more
• saturated
• temperature
• dilution

How can you tell when a solution is saturated?

Answer explanation

When a solution is saturated, it wouldn’t be able to dissolve for solute, and solid particles would be seen in the solution above.

Why do drink mixes come in powder form rather than solid?

Answer explanation

A drink mix in powdered form allows it to dissolve quicker. If the mix was solid, only the outer layer would dissolve. The inside would have to wait to mix with the water.

Tags

NGSS.MS-PS1-4

How can you change the rate of dissolution in an aqueous solution?

Answer explanation

To change the rate of dissolution, you can increase the temperature and add agitation (stirring) or decrease the surface area of the solute.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

How can the dilution of an aqueous solution change?

Answer explanation

To change the dilution of an aqueous solution, you would add more water to the solution to dilute it further.

Which answer choice correctly identifies the solute and solvent in this example?

• Water is the solvent, and sugar is the solute.

• Sugar is the solvent, and water is the solute.

• Water and sugar are both solvents; the finished solution is the solute.

• Water and sugar are both solutes; the finished solution is the solvent.

Which of the following illustrations would NOT increase the rate of dissolution of solid solutes in aqueous solutions?

• 1 and 2 only

• 1, 2, and 3 only

• 1, 2, 3, and 4

• 4 only

Tags

NGSS.MS-PS1-4

12 g of NaCl (salt) are dissolved into a beaker containing 50 mL of water at room temperature. How could the saltwater solution be diluted?

• To dilute the solution, add more salt and water in the original proportion.

• To dilute the solution, add more water.

• The solution cannot be diluted.

• To dilute the solution, add more salt