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Titrations

Titrations are used to measure the concentration of an unknown solution using a known solution while tallying the volumes. Several types of these include acid-base titrations, red-ox titrations, colorimetric titrations and gravimetric titrations.

959 Questions

How does pH affect titration?

pH plays a crucial role in titration as it helps determine the endpoint of the reaction. The pH at the equivalence point depends on the acid-base reaction being titrated. For strong acid-strong base titrations, the pH at the equivalence point is 7; for weak acid-strong base titrations, the pH is greater than 7; and for weak base-strong acid titrations, the pH is less than 7. pH indicators can also be used to visually show the endpoint of the titration based on color change.

What is the error that occur in the titration?

Common errors in titration include incomplete reaction, improper mixing of reagents, inaccurate measurements, presence of impurities in the sample, and endpoint detection errors (e.g., overshooting the endpoint). These errors can result in inaccurate titration results.

Why do buffers added in EDTA titration?

Buffers are added in EDTA titrations to maintain a constant pH of the solution. This is important because the formation of metal-EDTA complexes, which is critical in EDTA titrations, often requires a specific pH range to ensure accurate and precise results. Buffers help prevent pH changes due to addition of EDTA or metal ions, ensuring the reaction occurs under stable conditions.

What is the purpose of trial titration?

Trial titration is performed to determine the optimal dosage of a medication for a patient by starting at a lower dose and gradually increasing it until the desired therapeutic effect is achieved without causing significant side effects. This method allows healthcare providers to personalize treatment based on individual response and tolerance to the medication.

How is titration applied in every day life?

Titration is commonly used in everyday life to determine the concentration of substances in foods and beverages, such as measuring the acidity of lemon juice or the concentration of vitamin C in orange juice. It is also used in medical and pharmaceutical industries to determine the concentration of drugs in medication or to analyze blood samples for various substances. Additionally, titration is used in environmental monitoring to measure pollutants in water and air.

Why the titration cannot get the accurate result?

Titration may not give accurate results due to factors such as improper calibration of equipment, presence of impurities in the sample, incorrect reading of the endpoint, or incomplete reaction during titration. It is important to carefully follow the experimental procedure and ensure all equipment is working properly to obtain accurate results.

Why methanol is used in KF titration?

Methanol is used in Karl Fischer (KF) titration as a solvent and reaction medium for dissolving the sample being tested. It helps to facilitate the reaction between iodine and water in the titration process by making the water in the sample readily available for titration. Additionally, methanol helps to prevent side reactions that may interfere with the accurate determination of water content in the sample.

Why addition of water to the vinegar does not effect the determination of its concentration in titration?

Yes, it DOES effect the concentration (mol per litre). This is because the volume (of solution, litres) has changed, when diluting, but not the total quantity (just moles of 'reacting' vinegar in the titration).

What is the use of sorensen formol titration?

This method is used for estimation of free carboxyl group in amino acids & in mixture of amino acids. By this method one can determine the increase in carboxyl group which accompanies the enzymatic hydrolysis of proteins.

What is a titration and what equipment might you need?

A titration is a technique used to determine the concentration of a substance in a solution by reacting it with a reagent of known concentration. Equipment needed for a titration typically includes a burette, a pipette, a flask or beaker, a stirring rod, and an indicator or pH meter.

What pH indicator could be used in a titration?

A common pH indicator that could be used in a titration is phenolphthalein. It changes color from colorless to pink in the pH range of about 8.2 to 10, making it suitable for acidic to basic titrations.

What is a titration and what equipment would you need?

A titration is a technique used to determine the concentration of a substance in a solution by reacting it with a solution of known concentration. Equipment needed for a titration typically includes a burette, pipette, flask, indicator, and a stir plate.

What is a titration-quenching?

Titration quenching is a process where a substance is added to a solution to stop a chemical reaction or change in pH during a titration experiment. This substance helps to stabilize the solution at the endpoint of the titration, ensuring accurate results.

What are the advantages and disadvantages of acid-base titration?

Advantages:

Simple to do

Cost effective

Do not need high expertise

very accurate and precise

Can be used by low skilled trainees

Disadvantages:

Determining end point may be difficult (pending indicator used)

Requires careful attention to reach end point accurately (based on split-drop method)

What happens when a titration is done with Na2co3 in the biurrette and h2so4 in the flask?

When titrating Na2CO3 with H2SO4, the acid-base reaction that occurs is: Na2CO3 + H2SO4 → Na2SO4 + H2CO3 The carbonate ion (CO3^2-) in Na2CO3 reacts with the hydrogen ion (H+) in H2SO4 to form carbonic acid (H2CO3), which then decomposes into water (H2O) and carbon dioxide (CO2). The endpoint of the titration is reached when all the Na2CO3 has reacted with the H2SO4.

What kind of titrations are possible with phenolphthalein as indicator?

Phenolphthalein is commonly used in acid-base titrations because it changes color at a pH range of 8.2-10, making it ideal for determining the endpoint of the titration. It is also used in complexometric titrations to detect the presence of metal ions, as phenolphthalein can form colored complexes with certain metals.

What color will a solution be at the equivalence point of titration?

The color of a solution at the equivalence point of a titration depends on the type of indicator used. The indicator changes color at a specific pH value, signaling the completion of the reaction. Common indicators like phenolphthalein turn pink at the equivalence point of an acid-base titration.

What is the role of an indicator in the titration process?

An indicator in the titration process is a substance that changes color at or near the equivalence point of the reaction. It helps in determining the end point of the titration by signaling when the reaction between the analyte and titrant is complete. The choice of indicator depends on the type of titration being performed and the pH range of the reaction.

What effect does temperature have on a strong acid strong base titration?

Temperature can affect the reaction rate of the strong acid-strong base titration. An increase in temperature can accelerate the reaction rate, leading to a faster titration process. This can be advantageous in terms of quicker analysis, but it is important to maintain a consistent temperature throughout the titration for accurate results.

What does one look for to know when you met the end point in a titration?

The end point of a titration is typically indicated by a color change in the solution, known as the endpoint indicator, or a significant change in pH. It is important to look for a stable color change that persists for a short period of time to confirm that the reaction has reached completion.

How can titration be used to determine which antacid is the best?

Titration can be used to make sure that the base used in these tasks are standardized. This is important in finding out which antacid is the best because all the bases will have the same impact.

What is the name for the point at which the indicator changes color in a titration?

The point at which the indicator changes color in a titration is called the "endpoint". It signifies the completion of the reaction between the titrant and analyte in the solution being titrated.

Why is starch used as indicator in titration of iodine with sodium thiosulfate?

Starch forms a blue-black complex with iodine, making it easy to see when the iodine has been fully neutralized in the titration. The color change is very distinct, allowing for accurate endpoint determination in the titration process.

Why do you use ethanolic NaOH instead of aq NaOH in titration?

Ethanolic NaOH is used instead of aqueous NaOH in titration to avoid side reactions with water and reduce error in the titration process. The absence of water in ethanolic NaOH helps maintain the concentration and stability of the solution, resulting in more accurate and precise titration results.