Calculating Molarity

What is the molarity of 116 g of NaCl (MolarMass=58g/mol) in 4 L of solution?

• 0.5 M

• 1 M

• 5 M

• 2 M

When calculating Molarity (M) you must make sure to have which TWO units?

• mol

• Liters

• ml

• g

Tags

NGSS.HS-PS1-5

What is the molarity of a solution containing 68 g of NH₃ (Molar Mass =17g/mol) in 4 L of solution?

• 0.5 M

• 1 M

• 5 M

• 2 M

How many liters would you need to make a 1 M solution if you have 6 mol of Sodium Hydroxide?

• 2 L

• 3 L

• 4 L

• 6 L

How many grams of solute are required to make a 2 M NH₃ solution (Molar Mass = 17 g/mol)?

• 17 g NH₃

• 34 g NH₃

• 58 g NH₃

• 5.8 g NH₃

Which of the following is the CONCETRATION Formula?

• V₁M₁ = V₂M₂

• M = m/V

• V = mT

• PV = nRT

Tags

NGSS.HS-PS1-5

What is the molarity of 4 g of NaCl (molar mass =58.45) in 3,800 mL of solution?

• 0.018 M

• 0.0011 M

• 1.052 M

• 0.062 M

Find the molarity of 186.55 g of sucrose, C₁₂H₂₂O₁₁ (molar mass = 342 ) in 250 mL of water.

• 2.18 M

• 0.746 M

• 1.18 M

• 0.545 M

What is the molarity of a solution made by adding 1.565 moles of PbNO₃ to 500 mL?

• 300. M

• 31.3 M

• 3.13 M

• 1.56 M

What is the correct formula to solve for the Molarity of a solution that has .4 moles of HCl in 9.5 L of solution?

• M = 9.5 L / .4 mol

• M₁V₁=M₂V₂

• M = .4 mol / 9.5 L

• none of the other choices

Answer explanation

The correct formula to solve for the Molarity (M) of a solution is M = moles of solute / volume of solution in liters. In this case, we have 0.4 moles of HCl and 9.5 L of solution. So, the correct formula to use is M = 0.4 mol / 9.5 L, which gives the Molarity of the solution.