WorksheetsY10 IB - molarity & properties of water
Total questions: 14
Worksheet time: 28mins
5.2 mg NaCl (Mw = 58.44 g mol-1) is dissolved in 3.24 L of water. What is the concentration of the solution in mol L-1?
2.7X10-3 M
2.7X10-5 M
2.7X10-4 M
2.7X10-2 M
The molarity of a solution can be expressed as (check all that apply):
number of moles of solute per litre of solution
M
mol/L
mol L-1
The concentration of a solution can be increased in which of the following ways? Select both correct answers.
Heating the mixture to evaporate off solvent molecules
Adding more solvent
Adding more solute
Tipping half of the solution out
Which soft drink would you expect to taste the sweetest based on the sugar concentrations below?
1.0 M
3.0 M
3.1 M
2.5 M
The higher the concentration of a solution, the less solute per unti volume it has in it.
True
False
The ________ is the minor component of the solution that is dissolved by the _______.
solute, solvent
solvent, solute
How many liters would you need to make a 1 M solution if you have 6 mol of sodium hydroxide?
2
3
4
6
Calculate the molarity of 186.55 g of sucrose, C12H22O11 (MW = 342.3 g mol-1) in 250 mL of water.
2.18 M
0.746 M
1.18 M
0.545 M
How many grams of solute are dissolved in 125.0 mL of 5.00 M NaCl (MW = 58.45 g mol-1)?
0.625 g NaCl
625 g NaCl
36.53 g NaCl
0.04 mol NaCl
If you have 0.045 L of 0.465 M potassium bromide. How many moles of potassium bromide are present?
20.9 mol
0.021 mol
0.020 mol
0.0209 mol
All of the following are true about water (tick all that apply):
it is a polar compound
it can form hydrogen bonds
it can form dipole-dipole interactions
it can form dispersion forces
It is a gas at room temperature
The boiling point of water is 100°C at 1 atmosphere of pressure (sea level).
true
false
The density of water changes with temperature
true
false
