Molarity and Solution Concentration

The concentration or strength of a solution is called

• moles of solute

• L of solution

• molar mass

• molarity

Tags

NGSS.HS-PS1-5

The formula for molarity (M)

• M = moles solute / volume solution

• v = moles solute / M

• moles solute = M x v

• M x molar mass = moles

Tags

NGSS.HS-PS1-5

Increasing the volume of a solution without changing the solute amount (moles) will cause what effect on Molarity?

• Increase

• Decrease

Increasing the solute amount (moles) without changing the volume of a solution will have what effect on its Molarity?

• Increase

• Decrease

When given a number of moles of solute, the solution will always have the same concentration

• True

• False

Solve:

What is the Molarity of a solution with 0.25 moles of H₂SO₄ and 5 L of solvent?
_. (a)   M

Solve:

What is the number of moles of HCl in a 1.00 M solution that is 2.0 L?
_. (a)   mol

Solve:

How many liters of solvent are needed to make a 0.50 M solution from 1.25 moles?

_. (a)   L

Solve:
10.0 L of 0.70 M solution are diluted to 0.35 M solution. What is the new volume?
(a)   ._ M

Solve:
A 15.0 L solution has a molarity of 0.10 M. If its new volume is 50.0 L, what is its Molarity?
_. (a)   M