How many additional milliliters of titrant are needed to

Reference no: EM13383884

An ecobotanist separates the components of a tropical bark extract by chromatography. She discovers a large proportion of quinidine, a dextrorotatory isomer of quinine used for control of arrhythmic heartbeat. Quinidine has two basic nitrogens (Kb1 = 4.0 multiplied by 10-6 and Kb2 = 1.0 multiplied by 10-10). To measure the concentration, she carries out a titration. Because of the low solubility of quinidine, she first protonates both nitrogens with excess HCl and titrates the acidified solution with standardized base. A 32.80 mg sample of quinidine (M = 324.41 g/mol) is acidified with 6.65 mL of 0.150 M HCl.

(a) How many mL of 0.0127 M NaOH are needed to titrate the excess HCl?

(b) How many additional milliliters of titrant are needed to reach the first equivalence point of quinidine dihydrochloride?

Reference no: EM13383884

Questions Cloud

Determine both the empirical formula and the molecular : a compound contains 10.13 c and 89.87 cl by mass. determine both the empirical formula and the molecular formula of the

Albr3 is sold as a solution in ch2br2 this is a rather : albr3 is sold as a solution in ch2br2. this is a rather exotic solvent and somewhat difficult to work with as well

A equimolar mixture of h2 and d2 effuses through an : a equimolar mixture of h2 and d2 effuses through an orifice at a certain temperature. calculate the composition in mole

5000 g of ammonia react with 510 moles of sulfuric acid to : 500.0 g of ammonia react with 51.0 moles of sulfuric acid to produce ammonium sulfate. how many moles of excess

How many additional milliliters of titrant are needed to : an ecobotanist separates the components of a tropical bark extract by chromatography. she discovers a large proportion

The specific heat of compound a is 050 calg degrees : the specific heat of compound a is 0.50 calg degrees celsius. what amount of heat has been added to 100.0 g of compound

A cool to 300degc all the heat released goes to warm the : in some solar-heated homes heat from the sun is stored in rocks during the day and then released during the cooler

A 020 solution of is used to titrate 280 of a solution of : a 0.20 solution of is used to titrate 28.0 of a solution of unknown concentration. if 160ml of hcl is required what is

Which of the following reduces the solubility of calcium : which of the following reduces the solubility of calcium fluoride?a presence of uncommon ions such as na and cl-b

User Account

All Pages