Chem 121 Questions with Verified Solutions
The solubility of ammonium chloride at 70. Celsius is 60. grams of solute per 100. grams of
water. Which solution would be undersaturated at 70. Celsius?✔✔110. grams of solute per 200.
grams of water
How many mL of a 4.50 (m/v)% solution would contain 23.0 grams of solute?✔✔511 mL
How many moles of solute are dissolved in 400. mL of a 0.200 M solution?✔✔0.0800 mol
9.8 grams of H2SO4 is present in 2.0 L of a solution. The molarity of the solution is
_____.✔✔0.050 M
In the following reaction, the compound CH3NH2 behaves as:
CH3NH2 + H2O <_-_-_-_>Ch3NH3+ + OH-✔✔a base.
Bronsted and Lowry defined a base as a(n) _____.✔✔proton acceptor.
Which are the Bronsted-Lowry acids in the following equation?
NH3 + H2O--->NH2- + H3O+✔✔H3O+ and NH3
What is the conjugate acid of HS- in the following equation?
H2S + H2O--->HS- + H3O+✔✔H2S
Which of the following is a strong acid?✔✔H2SO4
, In a neutral solution the _____.✔✔concentration of hydronium ion and hydroxide ion are equal.
What is the pH of a solution whose H3O+ concentration is 1 x 10^-9?✔✔9
What is the concentration of an HBr solution if 12.0 mL of the solution is neutralized by 15.0 mL
of a 0.25 M KOH solution?✔✔0.31 M
Combining potassium hydroxide and sulfuric acid will produce water and _____.✔✔potassium
sulfate
Which of the following is the pH of a solution in which the concentration of hydroxide ion is
greater than the concentration of hydrogen ion?✔✔13
What is the net ionic equation when hydrobromic acid reacts with potassium
hydroxide?✔✔H+1 + OH- ---> H2O
According to Le Chatelier's principle, decreasing the temperature at which of the following
reaction takes place will
The statement, "An apple a day keeps the doctor away," is best described as
a(n)_____.✔✔Hypothesis
Which has neither a definite shape nor a definite volume?✔✔Gas
Which matter contains the greatest force of attraction between particles?✔✔Sodium metal
Which of the following is a homogenous mixture?✔✔Seawater
The solubility of ammonium chloride at 70. Celsius is 60. grams of solute per 100. grams of
water. Which solution would be undersaturated at 70. Celsius?✔✔110. grams of solute per 200.
grams of water
How many mL of a 4.50 (m/v)% solution would contain 23.0 grams of solute?✔✔511 mL
How many moles of solute are dissolved in 400. mL of a 0.200 M solution?✔✔0.0800 mol
9.8 grams of H2SO4 is present in 2.0 L of a solution. The molarity of the solution is
_____.✔✔0.050 M
In the following reaction, the compound CH3NH2 behaves as:
CH3NH2 + H2O <_-_-_-_>Ch3NH3+ + OH-✔✔a base.
Bronsted and Lowry defined a base as a(n) _____.✔✔proton acceptor.
Which are the Bronsted-Lowry acids in the following equation?
NH3 + H2O--->NH2- + H3O+✔✔H3O+ and NH3
What is the conjugate acid of HS- in the following equation?
H2S + H2O--->HS- + H3O+✔✔H2S
Which of the following is a strong acid?✔✔H2SO4
, In a neutral solution the _____.✔✔concentration of hydronium ion and hydroxide ion are equal.
What is the pH of a solution whose H3O+ concentration is 1 x 10^-9?✔✔9
What is the concentration of an HBr solution if 12.0 mL of the solution is neutralized by 15.0 mL
of a 0.25 M KOH solution?✔✔0.31 M
Combining potassium hydroxide and sulfuric acid will produce water and _____.✔✔potassium
sulfate
Which of the following is the pH of a solution in which the concentration of hydroxide ion is
greater than the concentration of hydrogen ion?✔✔13
What is the net ionic equation when hydrobromic acid reacts with potassium
hydroxide?✔✔H+1 + OH- ---> H2O
According to Le Chatelier's principle, decreasing the temperature at which of the following
reaction takes place will
The statement, "An apple a day keeps the doctor away," is best described as
a(n)_____.✔✔Hypothesis
Which has neither a definite shape nor a definite volume?✔✔Gas
Which matter contains the greatest force of attraction between particles?✔✔Sodium metal
Which of the following is a homogenous mixture?✔✔Seawater
