Define what concentration of cro4-2 is needed to precipitate

Assignment Help Chemistry

Reference no: EM13521274

1. A solution is 0.25 M in each of the cations Ba+2 and Ca+2.

a) What concentration of CrO4-2 is needed to precipitate as much Ba+2 as possible without precipitating the Ca+2? (BaCrO4:Ksp=2.1x10^-10; CaCrO4:Ksp=7.1x10^-4)

b) Remember the concentration of CrO4-2 depends on the acidity of the solution and is governed by the equilibrium:
Cr2O7-2(aq) + 3H2O(l) <--> 2CrO4-2(aq) +2H3O+(aq) K=2.5x10^-15

In a 0.25M solution of K2Cr2O7, what pH will give the equilibrium concentration of CrO4-2 calculated above?

Reference no: EM13521274

Questions Cloud

Determine the wavelength of the incident photons : An incident beam of photons is scattered through 167.0° the wavelength of the scattered photons is 125.29 pm. What is the wavelength of the incident photons

State balanced net ionic equations for the reactions : Write balanced, net ionic equations for the reactions expected when the following solutions are made moderately basic with the addition of NH3(aq) followed by addition of H2S(aq).

Evaluate the percentage of alcohol in the patient''s body : Calculate the percentage of alcohol in the patient's body. State the chemical reaction that took place in the patient's body.

Estimate the frequency of the third mode : A 20.0 cm long organ pipe is filled with air and is open at one end and closed at the other. What is the frequency of the third mode

Define what concentration of cro4-2 is needed to precipitate : What concentration of CrO4-2 is needed to precipitate as much Ba+2 as possible without precipitating the Ca+2. (BaCrO4:Ksp=2.1x10^-10; CaCrO4:Ksp=7.1x10^-4)

Obtain the focal length of the second lens : You plan to project an inverted image 30.0 cm to the right of an object. You have a diverging lens with focal length -4.00 cm located 6.20 cm to the right of the object. What is the focal length of the second lens

Explain difference between atom and ion size of an element : Discuss the trend in ion size within a family and a period and put a group of ions in order of increasing (decreasing) ion size and explain the difference between atom and ion size of an element.

Explain what is the rate of formation of carbon dioxide : What is the rate of formation of carbon dioxide over the specified time period in this reaction

Calculate the distance between the two fringes : A diffraction grating with 600 lines per mm is illuminated with light of wavelength 520. What is the distance between the two fringes

User Account

All Pages