What is the molarity (M) of 60.0 g of NaOH in 0.250 L of NaOH solution?

Question

Accepted Answer

STEP 1 State the given and needed quantities.

ANALYZE THE PROBLEM

Given

Need

Connect

60.0 g of NaOH, 0.250 L of NaOH solution

molarity (mole/L)

molar mass of NaOH,

[latex] \frac{moles of solute }{liters of solution }[/latex]

To calculate the moles of NaOH, we need to write the equality and conversion factors for the molar mass of NaOH. Then the moles in 60.0 g of NaOH can be determined.

[latex] \begin{array}{r c}\boxed{\begin{matrix} 1 mole of NaOH = 40.00 g of NaOH \\frac{40.00 g NaOH}{1 mole NaOH} ext{ and } \frac{1 mole NaOH}{ 40.00 g NaOH} \end{matrix}} \end{array} [/latex]

moles of NaOH = [latex] 60.0 \cancel{g NaOH} imes \frac{1 mole NaOH}{40.0 \cancel{g NaOH}}[/latex]

[latex] = 1.50 moles of NaOH[/latex]

volume of solution = 0.250 L of NaOH solution

STEP 2 Write the concentration expression.

Molarity (M) = [latex]\frac{moles of solute }{liters of solution }[/latex]

STEP 3 Substitute solute and solution quantities into the expression and calculate.

[latex] M = \overset{Three SFs}{\underset{Three SFs}{\frac{1.50 moles NaOH}{0.250 L solution} }} = \overset{Three SFs}{\underset{Exact}{\frac{6.00 moles NaOH}{1 L solution} }} = \underset{Three Sfs }{6.00 M NaOH solution}[/latex]

Question 9.11: What is the molarity (M) of 60.0 g of NaOH in 0.250 L of NaO...

Related Answered Questions

Describe each of the following solutions as isotonic, hypotonic, or hypertonic. Indicate whether a red blood cell placed in each solution will undergo hemolysis, crenation, or no change. a. a 5% (m/v) glucose solution b. a 0.2% (m/v) NaCl solution ...

Verified Answer:

In the northeastern United States during freezing weather, CaCl2 is spread on icy highways to melt the ice. Calculate the freezing point of a solution containing 0.50 mole of CaCl2 in 1 kg of water. ...

Verified Answer:

A doctor orders 1000. mL of a 35.0% (m/v) dextrose solution. If you have a 50.0% (m/v) dextrose solution, how many milliliters would you use to prepare 1000. mL of 35.0% (m/v) dextrose solution? ...

Verified Answer:

What is the molarity of a solution when 75.0 mL of a 4.00 M KCl solution is diluted to a volume of 500. mL? ...

Verified Answer:

How many milliliters of a 0.250 M BaCl2 solution are needed to react with 0.0325 L of a 0.160 M Na2SO4 solution? Na2SO4(aq) + BaCl2(aq) → BaSO4(s) + 2NaCl(aq) ...

Verified Answer:

When solutions of NaCl and AgNO3 are mixed, a white solid forms. Write the ionic and net ionic equations for the reaction. ...

Verified Answer:

How many liters of a 2.00 M NaCl solution are needed to provide 67.3 g of NaCl? ...

Verified Answer:

The topical antibiotic ointment Neosporin is 3.5% (m/m) neomycin solution. How many grams of neomycin are in a tube containing 64 g of ointment? ...

Verified Answer:

A topical antibiotic is 1.0% (m/v) clindamycin. How many grams of clindamycin are in 60. mL of the 1.0% (m/v) clindamycin solution? ...

Verified Answer:

A potassium iodide solution may be used in a diet that is low in iodine. A KI solution is prepared by dissolving 5.0 g of KI in enough water to give a final volume of 250 mL. What is the mass/volume percent (m/v) of KI in the solution? ...

Verified Answer: