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Worksheets16.2: Concentrations of Solutions
Total questions: 34
Worksheet time: 34mins
........................... is the number of moles of solute dissolved in one liter of solution.
Molarity
Molality
Solubility
A solution that contains a relatively small amount of solute is a ..................
concentrated solution
dilute solution
A concentrated solution contains a large amount of solute.
True
False
2.8 M
0.0028 M
28 M
140 mol
0.14 mol
1.4 M
Diluting a solution reduces the number of moles of solute per unit volume
True
False
The total number of moles of solute changes upon dilution.
True
False
1315 L
47.5 L
47.5 ml
34%
43%
68%
28 g
56 g
12 g
A solution with only a small amount of solute is called a ______ solution.
dilute
saturated
concentrated
homogeneous
A solution with a large amount of solute is called _________
dilute
saturated
concentrated
homogeneous
The mass of solution is equal to the difference of the masses of solvent and solute.
True
False
In solid-liquid solutions, volume of solution is larger than the volume of solvent.
True
False
In liquid-liquid solutions, volume of solution can be larger than volumes of sum of solute and solvent.
True
False
To calculate the concentration of a solution, multiply the mass of the solute (grams) with the volume of solvent (mL).
True
False
If 3.0 g of sugar is mixed in water to make 30 mL of solution, its concentration is:
0.1 g/mL
0.1 %
0.1 mL/g
1.0%
Suppose that a solution was prepared by dissolving 18.0 g of sugar into 100g of water. The percent by mass in the nearest whole number would be calculated as follows:
15%
18%
6%
82%
If a solution is made by taking 70 mL of ethanol and adding enough water to make 750 mL of solution, the percent volume is:
9.3%
10.7%
0.09%
70%
A 20g tube of cream contains 1.2% (w/w) of active ingredient. What is the mass of the active ingredient does the cream contain?
0.24%
2.4%
0.94%
9.4%
Which is the correct equation to calculate the mass of solute.
mass = concentration x 1000
mass = volume / concentration
mass = concentration / volume
mass = concentration x volume
1 dm3 is equal to which.
100 cm3
1 L
1000 g
10 cm3
How do you decrease the concentration of a solution. Choose 2 options
add more solvent
add more solute
remove solute
add more water
Which solution is more concentrated?
Solution 1:
5 L of water
100 g of salt
Solution 2:
5 L of water
90 g of salt
Solution 1
Solution 2
They have the same concentration
If 30.0 ml of a 4.25 M solution of NaOH is diluted to a final volume of 250.0 ml, what is the new molarity of this solution?
35.4 M
4.25 M
0.51 M
0.02 M
Calculate the volume of a 0.675 M solution of potassium iodide that must be used to create a 25. 0 ml solution of 0.150 M potassium iodide
5.56 ml
25.0 ml
37.0 ml
113 ml
You need to make 12.0 L of a 1.7 M solution of sodium bicarbonate, how many moles of sodium bicarbonate would you need for this solution?
0.142 moles NaHCO3
7.96 moles NaHCO3
13.7 moles NaHCO3
20.4 moles NaHCO3
How many liters of water would be needed to make a 3.5 M solution salt of water if you started with 5.0 moles of NaCl?
0.700 L
1.43 L
8.50 L
17.5 L
When calculating molarity, the amount of solute must be in what unit?
mililiters
liters
grams
moles
