Titration - raul siegers
Raul Siegers
Background/ Introduction:
Sodium hydroxides, NaOH Is a commonly used titrant for determining the concentration of acidic solutions. We also have guidelines and formulas for achieving and measuring the concentration for example concentration = amount per litre i.e. grams/litre (g/L) or mol/L (M = Molarity)
Primary standard and its importance can be justified by its accuracy to find the concentration of a solution, in this lab report; we will measure the concentration of NaOH and test our titration method as well as work with molar mass calculations. This will lead us to the “Standardization” a process where a solution’s concentration is determined accurately by titrating against the primary standard. Most importantly this experiment will enable us to test this system, and achieve a standardization of a NaOH solution.
It’s important to use a solution that is stable for the primary standard by this we mean one that will not degrade or change over time whilst reacting with the gases in the air, or absorbing water and more importantly a relatively stable pH in the solution. This NaOH solution can then be used to find the concentration of an acidic solution via titration.
We will use a primary standard suitable for standardizing a solution of NaOH which is the acid potassium hydrogen phthalate (KHC8H4O4) abbreviated: KHP)
Once this test has concluded we should be able to understand desirable characteristics of the primary standard and its purpose and, also validating our molar ratio between KHP and NaOH.
Aim:
To standardize an NaOH solution using the primary standard potassium hydrogen phthalate (KHP) and correctly exercise a titration.
Safety:
While we are working with dangerous chemicals/compounds (KOH + NaOH) it is important to remember to use them with diligent care as these chemicals can be corrosive or irritable. Even at low concentration this can have effects on skin and spillages must be avoided; dealt with if they occur. Safety
Background/ Introduction:
Sodium hydroxides, NaOH Is a commonly used titrant for determining the concentration of acidic solutions. We also have guidelines and formulas for achieving and measuring the concentration for example concentration = amount per litre i.e. grams/litre (g/L) or mol/L (M = Molarity)
Primary standard and its importance can be justified by its accuracy to find the concentration of a solution, in this lab report; we will measure the concentration of NaOH and test our titration method as well as work with molar mass calculations. This will lead us to the “Standardization” a process where a solution’s concentration is determined accurately by titrating against the primary standard. Most importantly this experiment will enable us to test this system, and achieve a standardization of a NaOH solution.
It’s important to use a solution that is stable for the primary standard by this we mean one that will not degrade or change over time whilst reacting with the gases in the air, or absorbing water and more importantly a relatively stable pH in the solution. This NaOH solution can then be used to find the concentration of an acidic solution via titration.
We will use a primary standard suitable for standardizing a solution of NaOH which is the acid potassium hydrogen phthalate (KHC8H4O4) abbreviated: KHP)
Once this test has concluded we should be able to understand desirable characteristics of the primary standard and its purpose and, also validating our molar ratio between KHP and NaOH.
Aim:
To standardize an NaOH solution using the primary standard potassium hydrogen phthalate (KHP) and correctly exercise a titration.
Safety:
While we are working with dangerous chemicals/compounds (KOH + NaOH) it is important to remember to use them with diligent care as these chemicals can be corrosive or irritable. Even at low concentration this can have effects on skin and spillages must be avoided; dealt with if they occur. Safety
References: “Standardizing an NaOH solution” Work Sheet, RMIT Certificate 4 Tertiary Preparation http://www.cerlabs.com/browes_exp.html ANAL 618 Standardisation of a Sodium Hydroxide solution (viewed 18 July 2011 MDSD Sheet for KHP http://msds.chem.ox.ac.uk/PO/potassium_hydrogen_phthalate.html http://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=76134220 (acidic form) http://pubchem.ncbi.nlm.nih.gov/summary/summary.cgi?sid=24898152 (basic form) “Parallax error” PNG (Image) http://trinity-tangodown.blogspot.com “Titration” (Image) http://www.monashscientific.com.au/SO2Titration.jpg