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1) In the laboratory, you dissolve 23.1 g of sodium carbonate in a volumetric flask and add water...

Question:

1) In the laboratory, you dissolve 23.1 g of sodium carbonate in a volumetric flask and add water to a total volume of 500 mL.

a) What is the molarity of the solution?

b) What is the concentration of the sodium cation?

c) What is the concentration of the carbonate anion?

2) In the laboratory, you dissolve 13.6 g of barium acetate in a volumetric flask and add water to a total volume of 250 mL.

a) What is the molarity of the solution?

b) What is the concentration of the barium cation?

c) What is the concentration of the acetate anion?

Stoichiometric Applications:

Stoichiometry is a field in chemistry that deals with the amounts of substances (atoms, molecules, particles, etc.) to other substances. The comparative units can moles, mass, number of particles (atoms, molecules, ions, formula units, etc.), heat, and more. Being able to recognize its applications and to do the needed calculations is an important skill. Remember that it is always best to start with a balanced chemical reaction equation or the chemical/molecular formula for the compound.

Answer and Explanation: 1

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Part 1:

(a) 0.436 M sodium carbonate

(b) 0.872 M sodium ions

(c) 0.436 M carbonate ions

Part 2:

(a) 0.213 M barium acetate

(b) 0.213 M barium...

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Calculating Molarity and Molality Concentration

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Chapter 8 / Lesson 4
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What is molarity? What is molality? Compare molarity vs molality by viewing molality and molarity formulas, how to calculate molarity and molality, and examples.


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