Solutions Quiz

What is a solvent?

• The substance that does the dissolving in a solution.
• The substance that is being dissolved in a solution.
• The mixing of different substances.
• The process in which neutral molecules lose or gain electrons

What is a substance that is dissolved in another substance? 

• solution
• solute
• solvent
• compound

What is it about the water molecule that makes it a great solvent?

• water demonstrates polarity; a partial charge on each side of the molecule
• due to its molecular formula
• it has a liner molecular shape
• due to it's non-polar molecular structure

Tags

NGSS.MS-PS1-1

Students are asked to make statements about the solubility graph above. Which student does
the best job of communicating the general features of the graph?

• Most salts require 100 grams of water in order to dissolve completely.
• Table salt has the average solubility of all salts.
• The solubility of most salts increases with increasing temperature.
• Most curves show a decreasing slope as the temperature rises.

Tags

NGSS.MS-PS1-4

In the above picture, a powder is about to be poured into the liquid. Which of the following should be done to make this powder dissolve faster?

• stir the powder in the liquid
• freeze the mixture
• add more powder to the liquid
• store the mixture in a dark place

Air is made up of mostly nitrogen gas with about 22% of air containing oxygen, CO₂, other gases . Which is the solvent in this solution of gas?

• nitrogen

• oxygen

• CO₂

• Other Gases

Kool-Aid - Powder, sugar, and water
Identify the solvent 

• water
• powder
• sugar
• powder and sugar

Fish breathe oxygen, which is dissolved in water. Is the oxygen the fish breathe considered to be the solute or solvent?

• Solute

• Solvent

To make a solute dissolve more quickly in a solvent, which would you do?

• Put it in cold water and stir it
• Put it in warm water and stir it
• Put cold water in it and let it sit

• Put warm water in it and let it sit.

The concentration of a mixture can be increased in which of the following ways?

• Heating the mixture
• Adding more water “solvent”
• Adding more powder “solute”
• Stirring the mixture