Lab Manual- Chapter 9 Questions With
Detaied Answers 2026.
Purpose - ANSWER- To prepare and standardize a sodium hydroxide solution.
To determine the molar concentration of a strong acid.;Procedure -
ANSWER- ;Volumetric Analysis - ANSWER- A chemical analysis that is performed
primarily with the aid of volumetric glassware. A known quantity or a carefully measured
amount of one substance reacts with a to be determined amount of anotehr
substance.;Primary Standard - ANSWER- An accurate mess of a solid substance is
measured, dissolved in water and then reacted with the substance being measured.
Relatively large molar mass, is nonhygroscopic an reacts in a predictable way.;Standard
Solution - ANSWER- A measured number of moles of a substance is present in a
measrued volume of a solution, generally expressed as the molar concentration of the
substance. A measured volume of the standard solution than reaction with the
substance being analyzed.;Titrant
Analyte - ANSWER- The liquid being dispensed in the buret.
The liquid present in the flask.;Stoichiometric Amounts - ANSWER- A reaction is
complete when the stoichiometric amounts of the reacting substances are combined.
These are the mounts corresponding to the mole ratio of the balanced
equation.;Stoichiometric Point - ANSWER- When the above definition occurs.;Acid-
Base Indicator - ANSWER- A substance with an acidic structure with a different color
than its basic structure.
In this experiment, phenolphthalein is colorless in an acidic solution but pink in a basic
solution.
Indicators are selected so that the stoichiometric point coincides with the endpoint of the
indicator.;Endpoint - ANSWER- The point in the titration where the phenolp changes
color.;pH - ANSWER- The negative logarithm of the molar concentration of H30+
pH=-log[h30+];Hygoscopic - ANSWER- Able to absorb water vapor readily
In this experiment, sodium hydroxide is very hygroscopic, therefore, its mass cannot be
measured to prepare a solution with an accurately known molar concentration.;Primary
Acid Standard - ANSWER- Is an accurate mass measurement of a solid substance that
is dissolved in water and then reacted. The primary acid standard in this experiment is
potassium hydrogen phthalate. Has a high purity, relatively high molar mass and it only
very slightly hygroscopic.
It will determine the molar concentration of a sodium hydroxide solution.;Secondary
Standard Solution - ANSWER- Once the molar concentration of the sodium hydroxide is
calculated, the solution is said to be standardized.;What is the titrant for this
experiment?
Detaied Answers 2026.
Purpose - ANSWER- To prepare and standardize a sodium hydroxide solution.
To determine the molar concentration of a strong acid.;Procedure -
ANSWER- ;Volumetric Analysis - ANSWER- A chemical analysis that is performed
primarily with the aid of volumetric glassware. A known quantity or a carefully measured
amount of one substance reacts with a to be determined amount of anotehr
substance.;Primary Standard - ANSWER- An accurate mess of a solid substance is
measured, dissolved in water and then reacted with the substance being measured.
Relatively large molar mass, is nonhygroscopic an reacts in a predictable way.;Standard
Solution - ANSWER- A measured number of moles of a substance is present in a
measrued volume of a solution, generally expressed as the molar concentration of the
substance. A measured volume of the standard solution than reaction with the
substance being analyzed.;Titrant
Analyte - ANSWER- The liquid being dispensed in the buret.
The liquid present in the flask.;Stoichiometric Amounts - ANSWER- A reaction is
complete when the stoichiometric amounts of the reacting substances are combined.
These are the mounts corresponding to the mole ratio of the balanced
equation.;Stoichiometric Point - ANSWER- When the above definition occurs.;Acid-
Base Indicator - ANSWER- A substance with an acidic structure with a different color
than its basic structure.
In this experiment, phenolphthalein is colorless in an acidic solution but pink in a basic
solution.
Indicators are selected so that the stoichiometric point coincides with the endpoint of the
indicator.;Endpoint - ANSWER- The point in the titration where the phenolp changes
color.;pH - ANSWER- The negative logarithm of the molar concentration of H30+
pH=-log[h30+];Hygoscopic - ANSWER- Able to absorb water vapor readily
In this experiment, sodium hydroxide is very hygroscopic, therefore, its mass cannot be
measured to prepare a solution with an accurately known molar concentration.;Primary
Acid Standard - ANSWER- Is an accurate mass measurement of a solid substance that
is dissolved in water and then reacted. The primary acid standard in this experiment is
potassium hydrogen phthalate. Has a high purity, relatively high molar mass and it only
very slightly hygroscopic.
It will determine the molar concentration of a sodium hydroxide solution.;Secondary
Standard Solution - ANSWER- Once the molar concentration of the sodium hydroxide is
calculated, the solution is said to be standardized.;What is the titrant for this
experiment?
