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Concentration Questions

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11 views2 pages

Concentration Questions

Uploaded by

h.kattula278
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Concentration Questions

1.​ Calculate the mole fractions of C2H5OH and water in an aqueous solution containing 100
grams of each compound.

2.​ What is the molality of a solution of 15.75 g NaCl in 175 g of CHCl3?

3.​ What is the molarity of a solution when 15.0 g of Ba(NO3)2 is dissolved in water to make
1450 ml of solutions?

4.​ What is the concentration in weight percent of 3 moles KCl dissolved in water to make
5.0 Kg of solution?

5.​ How many grams of sugar and water are needed to make 500.0 g of a 12.5% solution by
mass?

6.​ What is the concentration of ppm if 0.2 g Pb+2 dissolves in 2 liters of water
7.​ How many grams of H2SO4 are required to make 10.0 kg of a 5.0% (w/w) solution?

8.​ If you dissolve 10.0 g of sugar (C12H22O11) in 250 grams of water, what are the mole
fraction, molality and weight percent of sugar?

9.​ HCl is sold as a concentrated solution. Its molarity is 12.0 M and its density is 1.18
g/cm3. Calculate the molality and weight percentage.

10.​Concentrated H2SO4 has a density of 1.84 g/cm3 and is 95% by weight H2SO4. What is
the molality? Molarity?

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