Chapter 19 Chemistry Test
Calculate the hydrogen ion concentration for an aqueous solution in which (OH-) is 1 x 10^-11 mol/L. Is the solution acidic, basic, or neutral?
.001/1 x 10^-3/acidic (1 x 10^-14/ 1 x 10^-11)
When an acid reacts with a base, what compounds are formed?
A salt and a water
In a titration, when the number of moles of hydrogen ions equals the number of moles of hydroxide ions, what is said to have happened?
The equivalence point has been reached.
What is the hydrogen ion concentration if the pH is 3.7?
1.995 x 10^-4 (10^-3.7)
Which type of solution is one with a pH of 8?
Basic
The number of moles of hydrogen ions equals the number of moles of hydroxide ions
Equivalence Point
The form of the hydrogen ion is often written as
H+
Brønsted-Lowry Acid
Hydrogen-Ion Donor
Which of these is an Arrhenius base?
LiOH
What is pH?
The negative logarithm of the hydrogen ion concentration.
Negative logarithm of the hydrogen ion concentration
pH
What is the pH of a solution with a concentration of .01M of hydrochloric acid, HCl?
2 (-log(.01))
What is the pH when the hydrogen ion concentration is 7 x 10^-3M?
2.2 (-log(7 x 10^-3)
A .5M solution of a weak acid, HX, is only partially ionized. The H+ was found to be 4.02 x 10^-3 M. Find the dissociation constant for this acid.
3.23 x 10^-5 ((4.02 x 10^-3)^2/.5)
What is the acid dissociation constant of a weak acid if a concentration of .3M gives a hydrogen-ion concentration of .001M?
3.33 x 10^-6 ((.001)^2/.3)
What is the pH if the hydrogen-ion concentration is 6.8 x 10^-7M?
6.2 -log(6.8 x 10^-7)
If the hydrogen ion concentration is 10^-7M, what is the pH of the system?
7 (-log(10^-7)
If the hydrogen ion concentration of a solution is 10^-10M, is the solution acidic, alkaline, or neutral?
Alkaline
What is the best description for a solution with a hydroxide ion concentration of 1 x 10^-4M?
Basic
What type of acid is sulfuric acid?
Diprotic
Acid with two ionizable protons
Diprotic Acid
Process of adding a known amount of solution of known concentration to determine the concentration of another solution
Titration
The process of adding a known amount of solution of known concentration to determine the concentration of another solution is called...
Titration
What compound can act as both a Brønsted-Lowry Acid and a Brønsted-Lowry base?
Water
A substance with K(a) of 1 x 10^-5 would be classified as a...
Weak Acid