Chemistry 9Week Exam

What is a substance that is dissolved in another substance? 

• solution
• solute
• solvent
• compound

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

Another name for a homogeneous mixture is 

• an element.
• a solution.
• a compound.

A solvent

• present in the larger amount, substance that does the dissolving

• present in the smaller amount, substance that gets dissolved

• present in equal amounts, neither dissolves

500 mL of water is placed in a beaker, 10 grams of a salt in placed in the water and stirred. All the salt dissolves. The solvent is:

• the water

• the salt

• the beaker

• the mass of the salt

500 mL of water is placed in a beaker, 10 grams of a salt in placed in the water and stirred. All the salt dissolves. The solute is:

• the water

• the salt

• the beaker

• the mass of the salt

Tags

NGSS.MS-PS1-2

What does "like dissolves like" mean?

• polar solvents dissolve in polar solutes

• polar solutes dissolve in polar solvents

• non-polar solvents dissolve in polar solutes

• non-polar solutes dissolve in polar solvents

Which of the following word pairs correctly completes the sentence below?
_______ are corrosive substances characterized as having a strong smell, a sour taste, and a _______.

• Acids; pH less than 7
• Acids; pH greater than 7
• Bases; pH greater than 7
• Bases; pH less than 7

Holly has an unknown substance in a beaker. She wants to determine the relative pH of the unknown substance. She places a piece of blue litmus paper into the substance, and the litmus paper stays blue.
The substance in the beaker

• is a base.
• has a neutral pH.
  
• is an acid.
• does not have a pH.

What is neutral on the pH scale?

• 7
• 14
• P shape 
• H shape