State a naoh soln of unknown concentration was standardized

Assignment Help Chemistry

Reference no: EM13181388

1. A student standrdized a NaOH soln. using 15.00mL of 0.250 M HCl as a primary standard. Titration required 42.73 mL of NaOH. Cal the molarity of NaOH soln.

2. A NaOH soln of unknown concentration was standardized against KHP. It took 45.78 mL of NaOH soln to completely titrate 1.256 g of KHP. Cal the molarity of NaOH.

3. Students made the following common errors while standardizing NaOH using KHP as the primary standard. How will each of these errors affect the molarity of NaOH as compared to the correct value? Will it be higher, lower, or no different? Give a reason for each answer.

a. a small amount of KHP is spilled after weighing and while transferring to flask.

b. an air bubble in the buret tip releases in the middle of the titration.

c. the student titrates to a dark pink endpoint.

d. the student adds 150.00mL of water to flask instead of 100.00mL

e the KHP is damp when the student weighs it

Reference no: EM13181388

Questions Cloud

What is the most you would be willing to pay per share : If you can earn 13% on similar-risk investments, what is the most you would be willing to pay per share and if you can earn only 10% on similar-risk investments, what is the most you would be willing to pay per share?

What is the distance between the origin and the point : what is the distance between the origin and the point (5,-19)? if necessary, round your answers to two decimal places.

State caffeine has a distrubution coefficient : Caffeine has a distrubution coefficient of 8.4 for methylene chloride/ water. How much caffiene will be extracted from a 200 mL cup of Turkish coffee (250 mg caffeiene) by 100 mL of methylene chloride?

At what time does the stone hit the ground : A stone is thrown straight up from the edge of a roof, 950 feet above the ground, at a speed of 16 feet per second.

State a naoh soln of unknown concentration was standardized : A NaOH soln of unknown concentration was standardized against KHP. It took 45.78 mL of NaOH soln to completely titrate 1.256 g of KHP. Cal the molarity of NaOH.

What are commonly methods of evaluating marketing programs : For several years, advertisements for Arm & Hammer Baking Soda have prompted consumers to place an opened box of the product in the refrigerator to lessen food odor and to replace that box monthly. The same ads advise customers to pour the used bo..

What are the dimensions of the parcel : A rectangular Piece of land is 70ft longer than it is wide. Each diagonal between opposite corners is 130ft. What are the dimensions of the parcel?

Describe how value-at-risk is used as a tool : Describe how Value-at-Risk (VAR) is used as a tool to assist management with achieving its overall strategic financial goals?

Depict the lewis dot structure oxalate : Draw the lewis dot structure oxalate and for carbon dioxide. In terms of electronic structure, what happens when oxalate decomposes

User Account

All Pages