Free Printable 1.2 mole concept : e) concentration

Worksheets

1.2 mole concept : e) concentration

Total questions: 16

Worksheet time: 1hrs 14mins

Name

Class

Date

What is molality?

no of mole of solute in 1 liter of solution

no of mole of solute in 1 kg of solvent

Total number of mol fraction for all component in the solution is equal to

1.0

0.95

0.50

2.0

The molarity of a solution prepared by dissolving 45.0 g of glucose (C₆H₁₂O₆) in 71.0 mL of water is

0.0352 M

3.52 M

0.352 M

35.2 M

How many grams of chloride ions are there in 100 mL of 1.90 M aqueous solution of sodium chloride?

13.5 g

6.74 g

0.67 g

1.35 g

What mass, in grams, of sodium sulfate is needed to make 275 g total of a 1.5% aqueous solution of sodium sulfate?

6.0

7.5

4.1

2.2

How many grams of solute are dissolved in 125.0 mL of 5.00 M NaCl (MM = 58.45)?

0.625 g NaCl

625 g NaCl

36.5 g NaCl

0.04 mol NaCl

If you want to prepare a 200 mL aqueous solution of MgO which is 20% by mass magnesium oxide, how many grams of magnesium oxide would be needed?(assume that the density of the solution is the same as the density of water)

40 grams

50 grams

30 grams

20 grams

How many grams of Calcium fluoride are needed to prepare 980 mL a 2.0 molar aqueous solution?

150 grams

2.0 grams

1.5 x 10⁵ grams

160 grams

What is the molarity of 4.0 g of NaCl (Molar mass=58.45) in 3,800 mL of solution?

0.018 M

0.001M

1.052 M

0.062 M

10.

Calculate the mole fraction of benzene (C6H6) in a solution of 46.8 g benzene and 36.8 g of toluene (C7H8).

0.4

0.6

0.7

0.5

11.

Calculate the mass percent of solution, if there is 100 g of sugar and 400 g of water

12.

What mass of solute is needed to make 75.0 g of a 3.4% solution?

2.55 g

22 g

0.05 g

13.

What is the molality of a solution made by dissolving 2 moles of NaOH in 400 grams of water?

5 mol/kg. solvent

4 mol/kg solvent

3 mol/kg. solvent

2.5 moles /kg solvent

14.

Molarity is measured in _____.

moles per g.

mols per L.

moles per mm.

moles per mL.

15.

How do you convert from grams to moles?

Divide by the molar mass

Multiply by the molar mass

Divide by Avogadro's number

Multiply by Avogadro's number

16.

Calculate the number of moles in 10cm³ of 0.25 mol dm^-3 KOH

2.5

0.25

0.025

0.0025

Reset

1.2 mole concept : e) concentration

Total questions: 16

Worksheet time: 1hrs 14mins

Similar Resources on Wayground