24 Questions
What is the main reason why NaCl ionizes in solution?
To carry charge to the electrodes
Which of the following compounds is most soluble in hexane?
Compound D
In the potassium chloride solutions provided, which solution has the highest molarity?
Solution A
Which flask has the higher molarity when comparing Flask 1 and Flask 2?
Flask 2, because it has more moles of solute per liter of solvent than Flask 1.
What happens to solid copper (II) chloride when added to water based on the observation provided?
(aq) CuCl2 + 2 Cl-
Which of the following best describes a weak base?
A dilute strong base
How does crushing a sugar cube before adding it to a cup of coffee affect solubility?
Crushing the sugar cube increases the surface area, therefore solubility is increased.
If a small amount of solute remains undissolved in water, what kind of solution is this?
Unsaturated
Which type of students in the study might experience better relief from capsaicin, those who drink milk or those who drink water?
Those who drink milk because it dissolves capsaicin better due to its nonpolar nature.
What happens to the solubility of a substance when added to water if its molarity is doubled?
Solubility remains the same
What is required to make a supersaturated solution?
Adding more solute than what can normally be dissolved at that temperature
If 2 moles of KNO3 are dissolved in water to make 1 L of a solution, what is the molarity of the solution?
$2 M$
What would be the correct molarity of a solution prepared by dissolving 8.6g of KCl (molar mass = 74.5g/mol) in 500mL of solution?
0.095 M
Which ions are associated with bases, similar to the association of _____ ions with acids?
Hydroxide, Hydronium
How would a solution with a pH of 4.7 be classified?
Acid
If the pressure of a gas is halved from 4.00 atm to 2.00 atm at constant temperature, what happens to the volume?
Doubles
If a gas occupies 300mL at 2.00 atm pressure and the pressure decreases to 1.00 atm while keeping the temperature constant, what would be the new volume measurement?
600 mL
Why does a solution of hydrochloric acid conduct electricity, while a solution of distilled water does not?
Because hydrochloric acid contains mobile ions that can carry charge.
What effect does drinking milk have on the heat felt by the students after eating pepper?
It decreases the heat felt
Based on the data, which solvent appears to be the least effective at reducing the heat felt from eating pepper?
Nothing
Why do you think capsaicin dissolves better in one solvent over another?
The solute-solvent interactions are stronger in one solvent
In the Lewis structure of ethanol, what types of interactions can form between ethanol molecules?
Hydrogen bonds
Based on solubility principles, is ethanol soluble in water?
Yes, because of hydrogen bonding
What is the total pressure, in atm, in the tank at 327°C when 6.30 mol of CO(g), 4.50 mol of H2(g), and 2.25 mol of CH3OH are present?
1.32 atm
Test your knowledge on molarity calculations and acids-bases relations by answering multiple-choice questions. Topics include calculating molarity, relationship between ions and bases and acids, and classifying pH levels.
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