How do you find concordant results in titration?

How do you find concordant results in titration?

The titre will depend upon the volume of liquid in the conical flask, and the concentrations of the acid and alkali used. Repeat the titration several times until the titre is concordant (you have at least two titres within 0.20 cm 3 of each other).

How is concordant value calculated?

The concordance rate is the number of subjects that are concordant over the total number of subjects assessed. As can be seen in Figure 1, the concordance rate is calculated by adding the diagonal counts and dividing by the total number of subjects assessed.

What does concordant results mean in titration?

Concordant titres concordant-titre The expression “concordant titers” refers to the volume of two or more titres that are similar in quantity (less than a 0.10 mL difference between each other). We can calculate the mean titer for titration 1, 3 and 4, and ignore the titration 2.

What does concordant result mean?

its when you have two titre readings within 0.1 cm3 of each other.. so titres will have to be repeated till they become concordant.

What is the steps of titration?

Terms in this set (7)

  1. fill the burtte with known concentration of an acid or base.
  2. take a burtte reading from the top of the miniscus.
  3. place a flask with a unknown concentration of acid or base under the burtte.
  4. add a few drops of the appropriate indicator to the flask.
  5. slowly add your titrate to the flask while stirring.

What is the concordant value?

Concordant readings are frequently encountered in titrations in chemistry, where titre values are said to be concordant if they are within 0.20 cm3 of each other. Control variable: A control variable is one that will affect the outcome of the investigation.

Why do you need concordant results in titration?

Reliability: The results of an investigation may be considered reliable if readings are repeated, and concordant data is obtained. The more concordant your results are, the more reliable they are likely to be.

Why is a burette used in titration?

A titration is a very commonly used type of quantitative analysis. It is based on accurately measured volumes of chemicals. A burette is used to accurately measure the volume of liquid that has been allowed to pour out of it.

How do you know if results are concordant?

Concordant readings: If readings have been taken several times and the readings are identical, or close to each other, then they are described as concordant.

Which is the first step in titration process?

The first step in the titration process is; A measured volume of an acid or base of (un)known concentration is added to a flask.

How to do a concordant titration in chemistry?

Repeat steps 1 to 5 until you get concordant titres (see step 1 in the Analysis). More accurate results are obtained if acid is added drop by drop near to the end-point. Record the results in a suitable table, such as the one below.

How is titration used to measure the concentration of an acid?

Titration allows us to work out the concentration of, for example, an acid of unknown concentration, by using a fixed volume of it and measuring how much of an alkaline solution of known concentration is needed to react with all of it. To measure the fixed volume of the acid solution, chemists often use pipettes.

How is vitamin C concentration determined by titration?

in a solution by a redox titration using iodine. Vitamin C, more properly called ascorbic acid, is an essential antioxidant needed by the human body (see additional notes). As the iodine is added during the titration, the ascorbic acid is oxidised to dehydroascorbic acid, while the iodine is reduced to iodide ions. ascorbic acid + I 2

How many concordant titres should be ticked in chemistry?

At least two concordant titres should be ticked (✔). These are titres within 0.20 cm3 (or sometimes 0.10 cm3) of each other. Calculate the mean titre. This is the volume of acid that exactly reacts with the sodium hydroxide solution of unknown concentration.

About the Author

You may also like these