A back titration is a titration method where the concentration of an analyte is determined by reacting it with a known amount of excess reagent. The remaining excess reagent is then titrated with another, second reagent. A back titration may also be called an indirect titration..
Just so, what is back titration example?
In back titration you find the concentration of a species by reacting it with an excess of another reactant of known concentration. Then you titrate the excess reactant. For example, you may want to determine the concentration of a base, but the endpoint is not sharp enough for a precise titration.
Secondly, what are the advantages of a back titration? Advantages of doing back titration 1- Useful if the endpoint of the reverse titration is easier to identify than the endpoint of the normal titration. 2- Useful when trying to work out the amount of an acid or base in a non-soluble solid.
Beside above, why is back titration more accurate?
A back titration is necessary in situations where the reaction you are using to analyse the unknown substance is too slow to respond in a normal titration. In titration, you need the reaction to be able to reach a definite endpoint at practically the same moment as you have reached the stoichiometric equivalence point.
What is the difference between back titration and direct titration?
The main difference between back titration and direct titration is that a back titration determines the concentration of the unknown by determining the remaining amount of the compound with a known concentration whereas a direct titration directly measures the concentration of the unknown compound.
Related Question Answers
What is the difference between titration and back titration?
1 Answer. Ernest Z. In a direct titration, you add a standard titrant to the analyte until you reach the end point. In a back titration, you add an excess of standard titrant to the analyte, and then you titrate the excess titrant to determine how much is in excess.How is back titration used in real life?
The medical field has very real-life applications of titration. Pharmacists use titration in their field. Doctors also use titration to ensure they give patients the proper concentration of anesthetics before performing major surgeries. It is also used to measure glucose levels in the blood for those with diabetes.How many types of titration are there?
four
What does titration mean?
A titration is a technique where a solution of known concentration is used to determine the concentration of an unknown solution. Typically, the titrant (the know solution) is added from a buret to a known quantity of the analyte (the unknown solution) until the reaction is complete.What is double indicator titration?
A double indicator titration is the process used in chemistry experiments to determine and analyze the amount and concentration of acids or bases in a solution at two end points.Why is back titration used in aspirin?
Aspirin is a weak acid that also undergoes slow hydrolysis; i.e., each aspirin molecule reacts with two hydroxide ions. To overcome this problem, a known excess amount of base is added to the sample solution and an HCl titration is carried out to determine the amount of unreacted base.How do you calculate titration?
Use the titration formula. If the titrant and analyte have a 1:1 mole ratio, the formula is molarity (M) of the acid x volume (V) of the acid = molarity (M) of the base x volume (V) of the base. (Molarity is the concentration of a solution expressed as the number of moles of solute per litre of solution.)Can you do titration backwards?
In the case of acid/base reactions, an indicator is chosen which changes color as this occurs, allowing you to see the when the reaction is complete. A back titration is done when you deliberately (or accidentally) overshoot the original endpoint of the reaction and have to work in reverse.Why is back titration used to determine calcium carbonate?
A back titration is used when the molar concentration of an excess reactant is known, but the need exists to determine the strength or concentration of an analyte. Back titration is typically applied in acid-base titrations: When the acid or (more commonly) base is an insoluble salt (e.g., calcium carbonate)Why is titration important in real life?
Many real life uses of titration are used each day, especially in the medical world and labs. Pharmacists use it to get the proper mix when compounding medicines. It's used to get the necessary proportions in intravenous drips. Titration is used to measure blood sugar levels and to analyze blood for other diagnoses.What happens if you use the wrong indicator in a titration?
In contrast, using the wrong indicator for a titration of a weak acid or a weak base can result in relatively large errors, as illustrated in Figure 17.3. Just as with the HCl titration, the phenolphthalein indicator will turn pink when about 50 mL of NaOH has been added to the acetic acid solution.What is the end point in titration?
End Point. end point: the point during a titration when an indicator shows that the amount of reactant necessary for a complete reaction has been added to a solution.What is the principle of titration?
Titration is a quantitative chemical analysis. It is used to determine an unknown concentration of a known substance in a sample. The basic principle of the titration is the following: A solution - a so called titrant or standard solution - is added to sample to be analyzed. The titrant is added by means of a burette.What is the purpose of titration?
The concentration of a basic solution can be determined by titrating it with a volume of a standard acid solution (of known concentration) required to neutralize it. The purpose of the titration is the detection of the equivalence point, the point at which chemically equivalent amounts of the reactants have been mixed.Why is an indicator not used in redox titration?
Some redox titrations do not require an indicator, due to the intense color of the constituents. For instance, in permanganometry a slight persisting pink color signals the endpoint of the titration because of the color of the excess oxidizing agent potassium permanganate.Why do we perform blank titration?
This is done to ensure that either there are no substances in the solvent which can react with the titrant, or to estimate the amount of titrant that would react with the pure solvent. In this way, we can estimate the error that can be produced when the actual titration experiment is conducted.What is back and blank titration?
A blank titration is done without the analyte present to check for possible sources of error in the "blank" solution. A back titration is used when it is diffucult to find an endpoint in a normal titration (for example, if the analyte is not very soluble in water).What does normality mean?
Normality is a measure of concentration equal to the gram equivalent weight per liter of solution. Gram equivalent weight is the measure of the reactive capacity of a molecule. The solute's role in the reaction determines the solution's normality. Normality is also known as the equivalent concentration of a solution.What is indirect titration?
Indirect titration refers to the reverse process of performing titration. Generally, it involves two stages where the analyte reacts with the first reagent which is added in excess. The volume of the excess reagent is determined with its reaction with a second reagent. 
