一个ll GRE Subject Test: Chemistry Resources
Example Questions
Example Question #121 :General Chemistry
Determine the pH of asolution.
is a strong acid and therefore completely ionizes in solution. Therefore, all theions dissociate in themolecules in solutions according to the below chemical equation:
This means that the
Below is the equation to calculate pH:
Therefore,
Example Question #121 :General Chemistry
Determine the pH of asolution of.
is a strong base and therefore completely ionizes in solution. Therefore, all theions dissociate in themolecules in solutions according to the below chemical equation:
This means that the
NaOH solution. There is one mole of OH-in every mole
of NaOH, therefore:
The equation with the relationship between pH and pOH is below:
We can calculate the pH by rearranging this equation:
Example Question #121 :General Chemistry
Calculate the Ka for.
The pka ofis. The pka is simply calculated based on the following equation:
Therefore, in order to determine the ka, simply use f the following equation:
Example Question #121 :General Chemistry
Calculate the Ka for.
The pka ofis. The pka is simply calculated based on the following equation:
Therefore, in order to determine the ka, simply use f the following equation:
Example Question #122 :General Chemistry
Find the pH ofif itsisat.
is a symbol for the ionization constant for water. This value is temperature dependent. At, thefor water is.
Water dissociates or ionizes according to the chemical equation below:
因此,水的电离的结果:
Let us set
Example Question #121 :General Chemistry
Find the pH ofif itsisat.
is a symbol for the ionization constant for water. This value is temperature dependent. At, thefor water is.
Water dissociates or ionizes according to the chemical equation below:
因此,水的电离的结果:
Let us set
Example Question #121 :General Chemistry
有限公司nsidering thefor HCN is, what is thefor?
The equilibrium governing the dissolution of HCN in water is:
is the conjugate acid of. In other words,is the conjugate base of.
Using the relationship,, we can calculate the.
By rearranging the equation we get:
Example Question #41 :一个cid Base Chemistry
What is the pH of asolution of?
We need to calculate the pH of asolution. There is one mole ofin every mole
of, therefore:
The equation with the relationship between pH and pOH is below:
We can calculate the pH by rearranging this equation:
一个nother way of solving this problem is shown below. The equation with the relationship between
andconcentration is:
Rearranging this equation gives:
We can calculate the pH of this solution using the equation below:
Example Question #131 :General Chemistry
What is the pH of a solution in whichconcentration is?
The pH of a solution is related to the number of hydrogen ions in solutions. The equation to determine the pH of a solution is below:
Plugging the concentration given into the equation above gives:
Therefore, the pH of the solution is:
Example Question #41 :一个cid Base Chemistry
What is theconcentration of a solution with pH?
The pH of a solution is related to the number of hydrogen ions in solutions. The equation to determine the pH of a solution is below:
The above equation can be converted into the following form in order to determine the hydrogen ion concentration:
Therefore, the hydrogen ion concentration of a solution of pH 7 is:
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