Briefly explain whether the following techniques errors would result in a high o

ID: 995173 • Letter: B

Question

Briefly explain whether the following techniques errors would result in a high or a low experimental determination of the molar concentration of CH3COOH in vinegar.
1) A student uses the pipet bulb to blow the last bit of vinegar sample from the tip into the titration flask, after the pipet was drained.

2) A student fails to clean the pipet first. After delivering the vinegar sample, the student notices a drop of vinegar clinging to the inner surface of the pipet.

3) A student stops the titration when the pink persists throughout the solution for less than 10 s.

4) After completing a titration, a student notices that the buret is not clean. Droplets of NaOH solution are clinging to the inner surface of the buret. Briefly explain whether the following techniques errors would result in a high or a low experimental determination of the molar concentration of CH3COOH in vinegar.
1) A student uses the pipet bulb to blow the last bit of vinegar sample from the tip into the titration flask, after the pipet was drained.

2) A student fails to clean the pipet first. After delivering the vinegar sample, the student notices a drop of vinegar clinging to the inner surface of the pipet.

3) A student stops the titration when the pink persists throughout the solution for less than 10 s.

4) After completing a titration, a student notices that the buret is not clean. Droplets of NaOH solution are clinging to the inner surface of the buret.
1) A student uses the pipet bulb to blow the last bit of vinegar sample from the tip into the titration flask, after the pipet was drained.

2) A student fails to clean the pipet first. After delivering the vinegar sample, the student notices a drop of vinegar clinging to the inner surface of the pipet.

3) A student stops the titration when the pink persists throughout the solution for less than 10 s.

4) After completing a titration, a student notices that the buret is not clean. Droplets of NaOH solution are clinging to the inner surface of the buret.

Explanation / Answer

1) low, as the whole quantity of the vinegar is drined out from the tube

2) High, before using the pipet it has to be cleaned so as to maintain the correct measurment of the sample, also since drop of the vinegar was sticking to the pipet means the whole quantity was not drained out for the titration.

3) low, titration should be stoped when the pink colour persist for some time.

4) low, as it was observed after the end of the titration.

Navigate

Briefly explain whether the following situations will result in a too high or to

Briefly explain whether you agree with the following argument: \"Unfortunately,

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.

Briefly explain whether the following techniques errors would result in a high o

Question

Explanation / Answer

Related Questions

Navigate