CHEM 104 final Exam | Questions & Answers (100 %Score) Latest Updated 2024/2025
Comprehensive Questions A+ Graded Answers | With Expert Solutions
In this experiment scrap aluminum metal will be converted to the compound called ___.the name
commonly refers to _____________, which is a crystaline white solid. - alum; potassium aluminum
dodecahydrate
is the process of determining the exact concentration (molarity) of a solution - standardization
is one type of analytical procedure often used in standarization. in a this, an exact volume of one
substance is reacted with a known amount of another substance - titration
the point at which the reaction is complete in a titration is referred to as the ____. a chemical substance
known as a ____ is used to indicate the endpoint. the _____used in this experiment is phenolphthalein
which is an organic compound, is colorless in acidic solution and pink in basic solutions - endpoint;
indicator; indicator
I just finished preforming an organic reaction of 54g of sub. A and 84g of sub. B. My instructor told me
that I should be able to achieve a mass of 65g of product. Unfortunately I only got 35g. What is my
percent yield? (don't use the percent symbol). - 54
If I have 46g of sodium reacting with 23g of chlorine to form NaCl, what is my product in grams (don't
type units just the number) - 38
If you have 100grams of a substance with a molar mass of 63.18g/mol, how many moles do you have? -
1.58
What is the purpose of standardizing an acid or base solution? - to calculate its molarity
In the titration of a base with an acid, the endpoint is reached when the
___
changes color. - indicator
, Standardizing acid and base solutions ensures accurate and precise experimental results by determining
the exact concentration of the solutions being used, which is essential for quantitative analysis. (true or
false) - true
If i have 0.1L of a 5M solution how many moles do i have? - 0.5
If i have 19 grams of a substance whos molar mass is 113g/mol how many mols do i have? Do not use
units. - 0.168
Freezing point depression is a colligative property that depends on the ___
of the solute particles in a solution. - concentration
Which of the following factors affects freezing point depression? - nature of the solvent
Which of the following is used to represent freezing point depression? - ΔTf
Adding more solute to a solvent will decrease the freezing point further. (true or false) - true
Which of the following can be used to calculate the freezing point depression (∆Tf) of a solution? - -
molarity of soltion
-freezing point depression constant (Kf)
What is the name of the device that we will be using to measure the changes in temperature of the
metal- - calorimeter
Using the formula C=q/delta(T), solve the following: If I have a heat capacity of 95.0J/C, and my
temperature changed from 3C to 8C, what is my quantity of heat (q). - 475.0
Specific heat capacity is the amount of heat required to raise the temperature of a substance by one
degree Celsius per unit mass. (true or false) - true
Comprehensive Questions A+ Graded Answers | With Expert Solutions
In this experiment scrap aluminum metal will be converted to the compound called ___.the name
commonly refers to _____________, which is a crystaline white solid. - alum; potassium aluminum
dodecahydrate
is the process of determining the exact concentration (molarity) of a solution - standardization
is one type of analytical procedure often used in standarization. in a this, an exact volume of one
substance is reacted with a known amount of another substance - titration
the point at which the reaction is complete in a titration is referred to as the ____. a chemical substance
known as a ____ is used to indicate the endpoint. the _____used in this experiment is phenolphthalein
which is an organic compound, is colorless in acidic solution and pink in basic solutions - endpoint;
indicator; indicator
I just finished preforming an organic reaction of 54g of sub. A and 84g of sub. B. My instructor told me
that I should be able to achieve a mass of 65g of product. Unfortunately I only got 35g. What is my
percent yield? (don't use the percent symbol). - 54
If I have 46g of sodium reacting with 23g of chlorine to form NaCl, what is my product in grams (don't
type units just the number) - 38
If you have 100grams of a substance with a molar mass of 63.18g/mol, how many moles do you have? -
1.58
What is the purpose of standardizing an acid or base solution? - to calculate its molarity
In the titration of a base with an acid, the endpoint is reached when the
___
changes color. - indicator
, Standardizing acid and base solutions ensures accurate and precise experimental results by determining
the exact concentration of the solutions being used, which is essential for quantitative analysis. (true or
false) - true
If i have 0.1L of a 5M solution how many moles do i have? - 0.5
If i have 19 grams of a substance whos molar mass is 113g/mol how many mols do i have? Do not use
units. - 0.168
Freezing point depression is a colligative property that depends on the ___
of the solute particles in a solution. - concentration
Which of the following factors affects freezing point depression? - nature of the solvent
Which of the following is used to represent freezing point depression? - ΔTf
Adding more solute to a solvent will decrease the freezing point further. (true or false) - true
Which of the following can be used to calculate the freezing point depression (∆Tf) of a solution? - -
molarity of soltion
-freezing point depression constant (Kf)
What is the name of the device that we will be using to measure the changes in temperature of the
metal- - calorimeter
Using the formula C=q/delta(T), solve the following: If I have a heat capacity of 95.0J/C, and my
temperature changed from 3C to 8C, what is my quantity of heat (q). - 475.0
Specific heat capacity is the amount of heat required to raise the temperature of a substance by one
degree Celsius per unit mass. (true or false) - true
