WorksheetsThursday, 5/7 Attendance! Concentration Calculations
Total questions: 15
Worksheet time: 1hrs 15mins
Determine the molarity of 2.25 mole of sulfuric acid, H2SO4, dissolved in 725 mL of solution
322.2 M
3.1 M
0.32 M
2.25 M
What is the molarity of 3 mole of hydrochloric acid in 3 L of water
3
1
6
9
How many moles of NaCl are present in a solution with a molarity of 8.59M and 125 mL of solution?
1.07 gram
62.7 grams
62.7 mol
1.07 mol
Molarity is measured in
mols per L
moles per mL
moles per kJ
moles per kg
The ___ is the thing being dissolved
solute
solvent
How many liters would you need to make a 1 M solution if you have 6 mol of Sodium Hydroxide?
2
4
3
6
What is the concentration, in percent by mass, of 0.62 g of solute in 45.0 g of solution?
0.014 %
0.13%
1.4 %
What is the concentration, in percent by volume, of 15.3 mL of solute in 2.65 L of solution?
0.58%
0.0058%
5.8%
What mass of solute is needed to make 75.0 g of a 3.4% solution?
22 g
2.55 g
0.05 g
What is the concentration of a solution in parts per million if 0.02 grams of NaCl is dissolved in 1000 grams of water?
2 ppm
200 pm
20 ppm
0.2 ppm
Which unit can be used to express the concentration of a solution?
L/s
ppm
J/g
kPa
Which unit can be used to express the concentration of a solution?
mols/L
g/mol
m/s
amu
Brass is a copper-zinc alloy. If the concentration of zinc is relatively low, the brass has a golden color and is often used for inexpensive jewelry. If a 35.0 g pendant contains 1.7 g of zinc, what is the percentage mass by mass of zinc in brass?
10.1
6.7
7.5
4.9
A 2400.-gram sample of an aqueous solution contains 0.012 gram of NH3. What is the concentration of NH3 in the solution, expressed as parts per million?
5.0 ppm
20. ppm
15 ppm
50. ppm
The concentration of a Kool-Aid mixture can be increased in which of the following ways?
Adding more water "solvent"
Stirring the mixture
Adding more Kool-Aid "solute"
Evaporating the water "solvent"
