kthejohnster said:Calculate the molecular weight of unknown acid by titrating with 2N H2PO4 and 2N NaOH
Titration is a laboratory technique used to determine the concentration of a substance in a solution by adding a known amount of another substance of known concentration until the reaction is complete.
The purpose of calculating the molecular weight of an unknown using titration is to determine the identity of the unknown substance. By knowing the molecular weight, we can determine the chemical formula and potentially the properties of the substance.
The equipment needed for titration includes a burette, pipette, Erlenmeyer flask, and a titrant solution of known concentration. Other equipment such as a pH meter, indicator, and balance may also be used depending on the specific titration procedure.
The equation used to calculate the molecular weight of an unknown using titration is MW = (C x V x N)/m, where MW is the molecular weight, C is the concentration of the titrant, V is the volume of the titrant used, N is the normality of the titrant, and m is the mass of the unknown substance.
Some sources of error in titration include inaccurate measurements, improper mixing, and human error in determining the endpoint. These errors can be minimized by using precise and calibrated equipment, performing multiple trials, and ensuring proper technique is used throughout the titration process.