What is the universal solvent?

• salt
• sugar
• water
• ice

Tags

NGSS.MS-ESS2-4

A mixture with more solute dissolved in the solvent than is usually soluble is called:

• concentrated

• supersaturated

• saturated

• unsaturated

When you have added as much solute as can dissolve in the solvent, the solution is called:

• concentrated

• supersaturated

• saturated

• unsaturated

Which of the following is NOT a unit used to express concentration?

• Molality

• Molarity

• Mass percent

• Density

The moles of solute can be determined by multiplying the molarity of the solute by the volume of solvent.

• True

• False

The pH of a solution is tested, and it is found to be a basic solution. Of the following choices, what could the pH have been?

• 3
• 9
• 7
• 5

Human blood has a pH between 7.35 and 7.45. Which of the following best describes human blood?

• strongly acidic

• slightly acidic

• strongly basic

• slightly basic

Tags

NGSS.HS-LS1-3

Which of these pH values would indicate that a solution is a weak base?

• 4

• 5.6

• 8

• 13

When dissolved in water, acids produce:

• bases
• salts
• hydrogen ions
• hydroxide ions

Tags

NGSS.MS-PS1-2

Explain what happens when a strong acid and a strong base are poured into the same container.

• they form separate layers

• they mix physically but not chemically

• they break apart into separate elements

• they react to form a salt and water

Tags

NGSS.HS-PS1-7