What is the molarity of each of the following solutions: (b) 5.25 g of Mn(NO 3 ) 2 ⋅2H 2 O in 175 mL of solution,

Hey everyone, we're asked to calculate the polarity of a solution of 8.50 g of magnesium sulfate. Help to hydrate in 300 ml of solution. Now we've learned that polarity is equivalent to our moles of solute over our leaders of solution. So first let's go ahead and determine the moles of our salute, which is magnesium sulfate. Help to hydrate. First we're going to take our 8.50 g of magnesium sulfate hep to hydrate and we're going to use our dimensional analysis and convert this into moles. So calculating the molar mass of magnesium sulfate, have to hydrate, we end up with 246.483 g of magnesium sulfate hep to hydrate per one mole, Calculating this out and canceling out our units. We end up with a total of 0.03449 mole of magnesium sulfate. Help to hydrate. Now let's go ahead and calculate our total volume. So we were told that we had 300 ml of solution. And since we want this to be in leaders, we can use our dimensional analysis here And we know that 10 to the third middle leaders is equivalent to one leader. And when we calculate this out and cancel out our unit, we end up with 0.300 L. Now to calculate our polarity, we're going to take our two values. So we have 0. Mole of Magnesium sulfate. Have to hydrate and we're going to divide this by 0. L. Now this will get us to a polarity of 0.115, and this is going to be our final answer. Now, I hope this made sense and let us know if you have any questions.

Ch.13 - Properties of Solutions

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Brown 14th Edition

Ch.13 - Properties of Solutions

Problem 44b

Chapter 13, Problem 44b

What is the molarity of each of the following solutions: (b) 5.25 g of Mn(NO₃)₂⋅2H₂O in 175 mL of solution,

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Calculate the molar mass of Mn(NO_3)_2⋅2H_2O by adding the atomic masses of Mn, N, O, and H.

Convert the mass of Mn(NO_3)_2⋅2H_2O from grams to moles using the molar mass calculated in the previous step.

Convert the volume of the solution from milliliters to liters by dividing by 1000.

Calculate the molarity of the solution by dividing the number of moles of Mn(NO_3)_2⋅2H_2O by the volume of the solution in liters.

Express the final answer in moles per liter (M).

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Molarity

Molarity is a measure of concentration defined as the number of moles of solute per liter of solution. It is expressed in units of moles per liter (mol/L). To calculate molarity, one must know the amount of solute in grams, convert it to moles using the molar mass, and then divide by the volume of the solution in liters.

Molar Mass

Molar mass is the mass of one mole of a substance, typically expressed in grams per mole (g/mol). It is calculated by summing the atomic masses of all atoms in a chemical formula. For compounds like Mn(NO3)2·2H2O, the molar mass is essential for converting grams of the compound into moles, which is necessary for molarity calculations.

Volume Conversion

Volume conversion is the process of changing the volume measurement from one unit to another, such as from milliliters (mL) to liters (L). Since molarity is defined in terms of liters, it is crucial to convert the volume of the solution to liters by dividing the volume in milliliters by 1000. This ensures accurate calculations of concentration.

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Common Conversion Factors

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A solution is made containing 20.8 g of phenol (C₆H₅OH) in 425 g of ethanol (CH₃CH₂OH). Calculate (c) the molality of phenol.

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Calculate the molarity of the following aqueous solutions: (a) 0.540 g of Mg(NO₃)₂ in 250.0 mL of solution, (b) 22.4 g of LiClO₄ • 3 H₂O in 125 mL of solution,

Textbook Question

Calculate the molarity of the following aqueous solutions: (c) 25.0 mL of 3.50 M HNO₃ diluted to 0.250 L.

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Textbook Question

What is the molarity of each of the following solutions: (c) 35.0 mL of 9.00 M H₂SO₄ diluted to 0.500 L?

Textbook Question

Suppose that one wishes to use reverse osmosis to reduce the salt content of brackish water containing 0.22 M total salt concentration to a value of 0.01 M, thus render- ing it usable for human consumption. What is the mini- mum pressure that needs to be applied in the permeators (Figure 18.20) to achieve this goal, assuming that the oper- ation occurs at 298 K? (Hint: Refer to Section 13.5.)

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What is the molarity of each of the following solutions: (b) 5.25 g of Mn(NO3)2⋅2H2O in 175 mL of solution,

Verified video answer for a similar problem:

Key Concepts

Molarity

Molar Mass

Volume Conversion

What is the molarity of each of the following solutions: (b) 5.25 g of Mn(NO₃)₂⋅2H₂O in 175 mL of solution,