3. ifthe50.00mlsamplefromproblem2above wastitratedwitha0.00505medta, what volume (in milliliters) of edta solution would be needed to reach the endpoint? 4. experimental trials. based on the six trials, the group determines that the average concentration of the standard is 70.5 ppm with a standard deviation of 0.8 ppm. using the equation for the student’s t confidence interval found on page 41 of your lab manual and the t-value for a 95% confidence interval (refer to table on page 41), calculate the confidence interval for which there is a 95% chance of finding the “true value” of the standard solution’s concentration based on the data. put your answer in the format # lower limit < “true value” < # upper limit.