mzlady30

III. Questions.

1.During the titration several milliliters of deionized water are added to the Erlenmeyer flask containing the KHP solution. How will this affect the calculated concentration of NaOH (too high, too low, or unchanged?) Explain clearly.

2.A 25.00 mL volumetric pipet is rinsed with deionized water. Several drops of water remain in the pipet. It is then used to deliver a 25.00 mL aliquot of the KHP solution into the Erlenmeyer flask in which the sample will be titrated. How will this affect the calculated concentration of NaOH (too high, too low, or unchanged?) Explain clearly.

3.A buret is cleaned and rinsed with deionized water. Some water remains in the buret. It is then filled with the NaOH solution which is being standardized. How will this affect the calculated concentration of NaOH (too high, too low or unchanged?) Explain clearly.

4.During the preparation of the KHP solution, some KHP is spilled on the counter. How will this affect the calculated concentration of NaOH (too high, too low, or unchanged?) Explain clearly.

an alpha particle with an initial speed of 5.10x10^4 m/s enters into an electric field between two parallel plates through a hole in the center of the positive plate. If the distance between the plates is 9.00x10^-2m and the electric field is 115 V/m, what will be the alpha particles speed when it reaches the negative plate?

The wall of the Erlenmeyer flask occasionally rinsed with water from the wash bottle during the analysis of the acid solution. Will this technique result in the molar concentration of the acid solution being reported too high, too low or unaffected? Explain.

The dispensing of the Na2H2Y solution from the buret is discontinued when the solution turns purple. Because of this technique error, will the reported molar concentration of the Na2H2Y solution be too high ,too low, or too unaffected? explain?