Explain four-digit accuracy to minimize roundoff error

Reference no: EM13155895

In a titration of HNO3, you add a few drops of phenolphthalein indicator to 50.00 mL of acid in a flask. You quickly add 26.50 mL of 0.0502 M NaOH but overshoot the end point, and the solution turns deep pink. Instead of starting over, you add 36.75 mL of the acid, and the solution turns colorless. Then, it takes 3.50 mL of the NaOH to reach the end point. (a) What is the concentration of the HNO3 solution? My answer was 1.85 X 10^-2 M. but it said that I was wrong but within 10% of the correct value Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all intermediate results to at least four-digit accuracy to minimize roundoff error. M (b) How many moles of NaOH were in excess after the first addition? I got 4.64 X 10^-4 and it was right but it said I needed to check my significant figures.

Reference no: EM13155895

Questions Cloud

What type of anemia is most likely for ann : Considering the circumstances and the preliminary work-up, what type of anemia is most likely for Ann?

Find out the mean of regarding question : What does it mean if I have a standard error of estimate figure as 25.571?

Probability that no native americans are selected to jury : Suppose that 25 people are called in for jury duty, two of whom are Native American. If 12 of the 25 people are randomly selected to the jury. What is the probability that no Native Americans are selected to the jury?

Fishermen have suffered financial hardship : In recent years, fishermen have suffered financial hardship because of shortened fishing seasons, reduced catches and lower market prices. Moreover, fishermen have complained about price fluctuations and have called for a system of minimum prices.

Explain four-digit accuracy to minimize roundoff error : In a titration of HNO3, you add a few drops of phenolphthalein indicator to 50.00 mL of acid in a flask. You quickly add 26.50 mL of 0.0502 M NaOH but overshoot the end point, and the solution turns deep pink.

Design a security plan that describes counter-measures : Design a security plan that describes counter-measures that will manage the threats that put the organisation's information holdings at risk and disaster recovery processes.

Which represents a more dovish fed : Which leads to higher interest rates, which leads to higher output? Which leads to higher inflation? Which represents a more hawkish Fed? Which represents a more dovish Fed?

Find probability that six application forms have falsified : What is the probability that exactly six application forms have been falsified? Would you expect this probability to be small or large? Explain.

Explain the mechanism for each of andrea symptoms : Two women have benign pituitary tumors. Andrea has lost weight and complains of being hot all the time; she presents as thin and nervous, with tachycardia and exophthalmos.

User Account

All Pages