Question

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2. What is the molarity of a 0.30 liter solution containing 0.50 moles of NaCl?

3. Calculate the molarity of 0.289 moles of FeCl, dissolved in 120 ml of solution?

4. If a 0.075 liter solution contains 0.0877 moles of Cuco, what is the molarity?

Answer 1

Answer:

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Explanation:

2.  Well, we take the quotient...concentration=moles of solutevolume of solution

Explanation:

And thus concentration has the units of mol⋅L−1...

And so in this given scenario, the quotient gives....

concentration=[NaCl(aq)]=0.50⋅mol0.30⋅L=1.67⋅mol⋅L−1.

What are the concentrations with respect to [Na+], and [Cl−]?  

3. molarity=2.41molL

Explanation:

Molarity=Moles of soluteLiters of solution

Moles=0.289

Solution=120mL=0.12L

Therefore,

Molarity=0.289mol0.12L≈2.41molL

4. 1.169 mol/L

Explanation:

From the question given, we obtained the following information:

Volume = 0.075 L

Mole of CuCo = 0.0877 moles

Molarity =..?

Molarity is simply defined as the mole of solute per unit litre of the solution. It is represented mathematically as:

Molarity = mole /Volume

With the above formula, we can obtain the molarity of the solution as follow:

Molarity = 0.0877 mol / 0.075 L

Molarity = 1.169 mol/L

Therefore, the molarity of the solution is 1.169 mol/L