It does not affect the titration reading as water does not react with the reagents or change the number of moles of acid added.
Why does the addition of distilled water not affect titration?
Any distilled water you add to this erlenmeyer will change its volume, but won’t change the amount of substance of acid inside it, neither the initial volume you added of the acid solution. … The erlenmeyer can be rinsed only with distilled water, since the volume of acid solution used for the calculation is constant.
Does it matter if you add water to the titration flask Why or why not?
When you do a titration, you are titrating to an endpoint. You can use water to rinse the side of the flask, so all the reagents are in the reaction flask. So the presence of water should not affect the endpoint.
Why doesn’t the indicator affect the titration results?
Answer and Explanation:
This is because even at very low concentration of the species to be sensitive of is low, the color change is very distinct. This low concentration of indicator helps in making sure that it would not interfere with the titration itself by diverting the volume of titrant from the unknown.
Would adding extra distilled water to the Erlenmeyer flask during the titration affect the molarity of the NaOH solution explain?
Yes, adding extra water will change the total volume and thus make the NaOH molarity lower.
Why does adding distilled water not affect molarity?
Adding water to a titrant or analyte will change the concentration of that solution. … When you add water to a solution, the number of moles of the solvent stays the same while the volume increases. Therefore, the molarity decreases; the solution is diluted.
Why is the conical flask only rinsed with distilled water?
When doing titrations with aqueous solutions, only distilled water is used to rinse the conical flask so not to leave any residual chemicals in the…
Why is it unnecessary to dry the Erlenmeyer flask?
After rinsing the erlenmeyer flask with distilled water why is it not necessary to dry it before adding the acid? … This is done so that the base doesn’t mix with water droplets in the burette (formed while rinsing the burette with water) so that the concentration of the base doesn’t change.
Why does the pink color disappear in a titration?
The pink colour disappears more slowly near the endpoint because the titrant and the sample are almost completely reacted. … If excess base is present at the end of an acid-base titration, the pink phenolphthalein color fades if the solution is allowed to stand for a while.
Why do we rinse the Buret with NaOH?
why do you rinse the buret with the sodium hydroxide solution and not with distilled water? … So when water is added, we take the standard concentration of the titrant (e.g. NaOH), but bigger volume of it. So in the end you’ll have the incorrect result and you’ll get higher concentration than it is.
Why is it important to not add more than 3 drops of indicator?
It’s important to use only a few drops of indicator because if more of the indicator is used into the solution, it could change the pH since the indicator is a weak acid itself. We would ideal only want one or two drops because this would allow for the most accurate color change with the different salts.
What happens if you add too much indicator to a titration?
If a large amount of indicator is used, the indicator will effect the final pH, lowering the accuracy of the experiment.
How do you tell if you exceeded the equivalence point in your titration?
How do you tell if you have exceeded the equivalence point in your titration? – We have to find an indicator which will be able to tell us whether the solution is neutralized into pH 7. The indicator might have different color for each pH. So, it will be able to tell us the pH of that particular solution.
Is deionized water the same as distilled water?
Deionized (DI) water is water that has been treated to remove all ions – typically, that means all of the dissolved mineral salts. Distilled water has been boiled so that it evaporates and then re-condensed, leaving most impurities behind. … Filtered water is heated until it has evaporated, turning into steam.
Why do you rinse the pipette with solution?
Rinsing with solution to be used ensures removal of any moisture adhering to glass. To contain the reaction mixture. Rinsing with the solution to be added from the pipette would increase the moles of substance used in the reaction, so the titre volume would be greater than it should be.
Which of the following choices is the best explanation for why it does not matter how much water you added when dissolving the acid or when carrying out the titration?
Why doesn’t it matter how much water you add when dissolving the acid or when carrying out the titration? The amount of water makes no difference because you have already massed the solid acid, and will use that mass to calculate the moles of acid to titrate with the unknown base.