Concetration equals the acetic acid concentration

Assignment Help Chemistry
Reference no: EM13130887

Question about Titration

Second method for determining the Ka of acetic acid by titration with NaOH.

I would like to see the details of the calculations. For my lab experiment I have the following data:

Titration#1

4 drops of methyl red indicator (to show endpoint).
Burette fill with 50ml of 0.1 M NaOH.
Titrate by adding 1ml increments of NaOH.
Continue titration past the endpoint to a pH of 11-12.

QUESTIONS:

1. Determine the pH at the point in which the acetate ion concetration equals the acetic acid concentration. (that is where the acetic acid is 50% ionized). Record this pH value. (ANSWER IS pH = 5.0)

2. The pKa of an acid equals the pH of the solution when 50% of the acid has been ionized. What is the pKa of acetic acid? Calculate the Ka as well. Example: pH = pKa + log[A-]/[HA]

3. Look up the pKa and Ka for acetic acid and record them here.(compare your results from #2 above to the standard or accepted pKa and Ka)

4. Look up the accepted value for the Ka acetic acid in a handbook or on the internet. Calculate the percent error between the experimental and accepted values according to:
% error = / experimental Ka - accepted Ka /
accepted Ka * 100%

Reference no: EM13130887

Questions Cloud

Analyze overall process of accounting for insolvencies : Analyze overall process of accounting for insolvencies and make at least one recommendation for improving current practices. Provide specific examples of how your recommendation would be an improvement.
Find standard deviation of distribution of the sample mean : If researchers want to take a new sample of size 55, what will be the standard deviation of the distribution of the sample mean?
How many brackets should jasper produce in january : Finished goods inventory at the end of last December was 200 units. Ending finished goods inventory is equal to 25 percent of the next month's sales. Jasper Company expects to sell the brackets for $45 each. How many brackets should Jasper produce..
Problem related to preliminary itemized deductions : Bela and Ricky are married taxpayers who file a joint return. In 2009, they had AGI of $350,000 and their preliminary itemized deductions totaled $20,000. In 2010, they also had AGI of $350,000 and preliminary itemized deductions of $20,000. Which..
Concetration equals the acetic acid concentration : Determine the pH at the point in which the acetate ion concetration equals the acetic acid concentration. (that is where the acetic acid is 50% ionized)
Discuss how you will report the breach : Assume that you are a key member on an audit engagement team and discover a breach in internal controls. Discuss how you will report the breach and your expectations of management for a resolution to the breach.
Probability that one is a republican followed by democrat : If two voters are randomly selected for a telephone survey, what is the probability that they one is a Republican followed by a Democrat? Round your answer to 4 decimal places.
Draw an e-r diagram with cardinalities of the store revenue : All disbursements and receipts are handled in the store’s main checking account. Draw an E-R diagram with cardinalities of the store’s revenue cycle.
What is the enthalpy of this reaction : total of 2.00 mol of a compound is allowed to react with water in a foam coffee cup and the reaction produces 149 g of solution. The reaction

Reviews

Write a Review

 

Chemistry Questions & Answers

  What was the final temperature

A 4.20 g nugget of pure gold absorbed 299 J of heat. The initial temperature was 22.0°C. What was the final temperature.

  What is the percent yield of a reaction

What is the percent yield of a reaction in which 228. g phosphorus trichloride reacts with excess water to form 118 g HCl and aqueous phosphorus acid (H3PO3)?

  How many grams of zinc have been consumed

If 138 mL of wet H2 is collected over water at 24°C and a barometric pressure of 748 torr, how many grams of Zn have been consumed? (The vapor pressure of water is 22.38 torr at 24°C.)

  What is the mole percent oxygen in the mixture

A gaseous mixture of O2 and Kr has a density of 1.111 g/L at 420. torr and 300. K. What is the mole percent O2 in the mixture?

  What assumptions are necessary for the derivation

For a gas sample of N molecules that consists of N1 molecules of mass m1 and N2 molecules of mass m2, follow through a derivation which led to the result PV=1/3mv2 and PV = nRT.

  What is the distribution ratio of a

Metal A was determined to be 95% extracted into methylene chloride with dethizone at pH6, when equal volumes of aqueous and non-aqueous solvents were used. what is the distribution ratio of A

  How many grams of the nonvolatile solute glycerol must added

The vapor pressure of pure methanol, CH3OH, at 30 C is 160. torr. How many grams of the nonvolatile solute glycerol, C3H5(OH)3, must be added to 131. g of methanol to obtain a solution with a vapor pressure of 133. torr.

  How many kilograms of alcohol are in mouthwash

If each bottle contains 0.358 pint of mouthwash with a density of 0.880g/mL , how many kilograms of alcohol are in 200 bottles of the mouthwash.

  Calculate concentration of carbonic acid

The pH of a bicarbonate-carbonic acid buffer is 8.00. Calculate the ratio of the concentration of carbonic acid (H2CO3) to that of the bicarbonate ion (HCO3-).

  What mass of aluminium was used

Aluminum reacts with hydrochloric acid to produce aluminum chloride and hydrogen gas. If 927 mL of hydrogen gas is collected by displacement of water at 740.0 mm Hg and 20. °C.

  Determine the heat capacity of the calorimeter

adding the two portions of water into your calorimeter the temperature of the mixed portions of water to be 45 oC. determine the heat capacity of the calorimeter?

  What volume will 500 ml of gas occupy

What volume will 500 mL of gas at 20°C and a pressure of 420 mm Hg occupy if the temperature is reduced to -80°C and the pressure is increased to 650 mm Hg?

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd