Important information about quant problems

Reference no: EM13125692

Important information about Quant problems
EDTA I
Calculate pFe2+ at Ve in the titration of 25.00 mL of 0.02026 M EDTA by 0.03855 M Fe2+ at pH
6.00.

EDTA II
A sample contained Ni and Zn ions as the only metals that would bind to EDTA. A 50.0 mL solution of Ni2+ and Zn2+ was treated with 25.0 mL of 0.0452 M EDTA to bind all of the metal. The excess unreacted EDTA required 12.4 mL of 0.0123 M Mg2+ for complete reaction. An excess of the reagent 2,3-dimercapto-1-propanol was then added to the solution to displace the EDTA that was bound to zinc. Another 29.2 mL of 0.0123 Mg2+ was required for reaction of the EDTA that had been liberated from zinc. Calculate the molarity of Ni2+ and the molarity of Zn2+ in the original solution.

EDTA III
Consider the EDTA titration below:
Zn2+ + Y4- ↔ ZnY2- Kf = 3.2×1016
a.) How many mL of 0.1050 M EDTA solution are required to reach the equivalence point in the titration of 20.00 mL of 0.1433 M Zn2+, buffered at pH 10.00? (αY4- = 0.30 at pH 10.00) b.) What is the pZn at the equivalence point? c.) How many mL of EDTA solution would have been needed if the analyte solution was 20.00 mL of 0.1433 M Fe3+ instead of 20.00 mL of 0.1433 M Zn2+?

EDTA IV
A 50.0 mL sample containing Ni2+ was treated with 25.0 mL of 0.0500 M EDTA and buffered at pH 10.00. The excess EDTA was then back-titrated, requiring 5.00 mL of 0.0518 M Zn2+. What was the concentration of Ni2+ in the original solution? (At pH 10.00 αY4- = 0.30. KNiY = 2.5×1018. KZnY = 3.2×1016)

Reference no: EM13125692

Questions Cloud

Discuss the apparent differences in order of presentation : Discuss the apparent differences in the order of presentation of the components of liabilities and shareholders' equity between IFRS as applied by British Airways and a typical balance sheet prepared in accordance with U.S. GAAP.

What mass of solid citric acid and how many milliliters : What mass of solid citric acid (g) and how many milliliters of 0.500 M NaOH are needed to produce 100.0 mL of a buffer with a pH of 6.50 and a weak base concentration of 0.0250 M

Why is data security important now more than ever : Why is data security important now more than ever? What are some of the steps that we can take to ensure that our database is protected and secure? How can you use user views to enhance security and restrict access?

Illustrate what would be the likely account titles : Locate Note 35 in BA's financial statements. What three items comprise “Other reserves” as reported in the balance sheet? If British Airways used U.S. GAAP, illustrate what would be the likely account titles for the three items?

Important information about quant problems : Important information about Quant problems, Calculate pFe2+ at Ve in the titration of 25.00 mL of 0.02026 M EDTA by 0.03855 M Fe2+ at pH

Question regarding dihedral groups : Use the gemerators and relations for D(sub2n)= to show that if x is any element of D2n, that is not a power of r, then rx=xr^-1.

What is the opportunity cost of accepting the offer : Susan Ortiz operates a covered parking structure that can accommodate up to 600 cars. Susan charges $6 per hour for parking. Parking attendants cost $12 per hour each to staff the cashier's booth at Susan's Parking. The Facility has two parking at..

How long will it take for 90.% of the reactant to disappear : The second-order reaction, 2 Mn(CO)5 Mn2(CO)10 has a rate constant equal to 3.0 x 109 M-1s-1 at 25°C. If the initial concentration of Mn(CO)5 is 1.0 x 10-5 M.

Probability that customer spend more time in record store : Based on this information, what is the probability that a customer will spend more than 9 minutes in the record store?

User Account

All Pages