Chemical Solutions

Hana put the same amount of salt into these two beakers of water. She stirred them into the same amount of water.
 
In which beaker does the salt dissolve more quickly?

• Beaker A because the temperature is lower

• Beaker B because the temperature is higher

• The salt dissolves at the same speed in both beakers

• The salt does not dissolve in either beaker. It sinks to the bottom

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

What combination would dissolve a solid solute the fastest?

• high temperature, no stirring

• no heat, no stirring

• sugar cube, no heat

• high temperature, stirring

Tags

NGSS.MS-PS1-4

The diagram shown is a model of 2 different sugar and water solutions. The small circles represent particles of sugar. What is the best claim that can be made from the evidence in the models.

• Solution A is more concentrated because it contains more solute

• Solution A is more concentrated because it contains more solvent

• Solution B is more concentrated because it contains more solute

• Solution B is more concentrated because it contains more solvent

Tags

NGSS.MS-PS1-2

Solutions are composed of __________ .

• salts and solutes

• solvents and salts

• solutes and alloys

• solutes and solvents

A ​ (a)   solution has a very little amount of solute in a large amount of solvent. A ​ (b)   solutions has a lot of solute in a small amount of solvent.

• dilute

• concentrated

• sparse

• abundant

• scant

What is a solvent

• A liquid that will dissolve a solid solute

• Another word for solution

• A thing that make drinks change colour

• Usually the solid about to be dissolved

The universal solvent:​ ​ (a)  

• water

• solvent

• solute

• heterogeneous mixture

• saturated solution

• unsaturated solution

• supersaturated solution

• concentrated

• diluted

A substance that can be dissolved by a solvent to create a solution.

• solvent

• solute

• solution

• mixture

Students mixed two liquids in a beaker and listed their observations. Based on these observations, which statement contains the best evidence that a chemical reaction occurred?

• There is a change in shape.

• There is a change in volume.

• The two liquids mix into a solution.

• The two liquids form a new substance.

Tags

NGSS.MS-PS1-2

You can make a solution more concentrated by adding __________.

• solute

• solvent

• water