[xo1991]

This is for a prelab and I'm pretty much clueless. help would be much appreciated. I have absolutely no idea what this means.

1.
The average concentration of secondary standard sodium hydroxide is used to calculate the concentration of acetic acid in titrated vinegar samples. What procedure must be performed to find the value for the average concentration of the secondary standard sodium hydroxide? How many significant figures are contained in its concentration?

2.
A dilution factor of 1:4 will allow one to titrate a 10-mL aliquot of diluted vinegar against 0.1025 M NaOH that will use titrant in the ideal range of 12-40 mL of NaOH.
The preliminary titration of a 5-mL aliquot of vinegar required 35 mL of the secondary standard sodium hydroxide to titrate to a faint pink end point.
Show the calculation for approximately how much sodium hydroxide would be used in the titration of a 10-mL aliquot of diluted 1:4 vinegar.