Moles and concentration

The ___ is the thing being dissolved

• solute
• solvent

Solvent is best defined as-

• a mixture in which the substances are spread out evenly between one another and cannot be told apart
• the ability of a substance to dissolve in another substance
• a substance that dissolves in another substance
• a substance into which another substance dissolves

Which answer best defines solute?

• a substance into which another substance dissolves
• a substance that dissolves in another substance
• to form a solution with another substance
• the ability of a substance to dissolve in another substance

Concentration of a solution is expressed in

• moles
• molar
• molar mass
• molarity

Tags

NGSS.HS-PS1-5

Molarity is

• moles per unit vol (cm³)
• moles per unit vol (dm³)
• moles per unit vol (m³)
• moles per unit vol (mm³)

Unit for molarity

• g/dm³
• m
• g/cm³
• M

Tags

NGSS.HS-PS1-5

If 5 moles solutes added to 1 dm³ of solution, concentration will be

• 5M
• 2M
• 1M
• 1.5M

To prepare 1M of NaOH (rmm: 40g/mol), you will need a mass of ______g NaOH

• 23g

• 40g

• 4g

• 39g

To prepare 2.5M of NaOH (rmm: 40g/mol), you will need a mass of ______g NaOH

• 10g

• 100g

• 40g

• 80g

If I added 120g of NaOH(rmm: 40g/mol)into 1 dm³ of solution the molarity will be

• 2M

• 3M

• 120M

• 40M