This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: An industrial plant processes its waste water through a sedimentation tank that removes hazardous ... (Read 48 times)

Mimi

  • Hero Member
  • *****
  • Posts: 542
on: Aug 23, 2018
An industrial plant processes its waste water through a sedimentation tank that removes hazardous metals by precipitating them as insoluble carbonate salts. If sodium carbonate is gradually added to the tank, what would be the order of precipitation of the metals, Pb2+, Cu2+, Hg22+, and Zn2+ if each is  1.0  104 M? ( Ksp PbCO3 = 7.4  1014, Ksp CuCO3 = 1.4  1010, Ksp Hg2CO3 = 8.9  1017, and Ksp ZnCO3 = 1.4  1011)
   
  a.
  Pb2+, Hg22+, Zn2+, Cu2+
   
  b.
  Hg22+, Pb2+, Zn2+, Cu2+
   
  c.
  Cu2+, Zn2+, Pb2+, Hg22+
   
  d.
  Cu2+, Zn2+, Hg22+, Pb2+
   
  e.
  All metal ions will precipitate at the same time.

Question 2

A solution is 0.010 M in each of Pb(NO3)2, Mn(NO3)2, and Zn(NO3)2. Solid NaOH is added until the pH of the solution is 8.50. Which of the following statements is true?
   Salt
  Ksp
  Pb(OH)2
  1.4  1020
  Mn(OH)2
  2.0  1013
  Zn(OH)2
  2.1  1016
   
   
  a.
  No precipitate will form.
   
  b.
  Only Pb(OH)2 will precipitate.
   
  c.
  Only Mn(OH)2 will precipitate.
   
  d.
  Only Zn(OH)2 and Pb(OH)2 will precipitate.
   
  e.
  All three hydroxides will precipitate.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

jointhecircus

  • Sr. Member
  • ****
  • Posts: 343
Reply #1 on: Aug 23, 2018
Answer to Question 1

b

Answer to Question 2

d


Mimi

  • Member
  • Posts: 542
Reply 2 on: Aug 23, 2018
Great answer, keep it coming :)

amandalm

  • Member
  • Posts: 306
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Cutaneous mucormycosis is a rare fungal infection that has been fatal in at least 29% of cases, and in as many as 83% of cases, depending on the patient's health prior to infection. It has occurred often after natural disasters such as tornados, and early treatment is essential.

Did you know?

Chronic necrotizing aspergillosis has a slowly progressive process that, unlike invasive aspergillosis, does not spread to other organ systems or the blood vessels. It most often affects middle-aged and elderly individuals, spreading to surrounding tissue in the lungs. The disease often does not respond to conventionally successful treatments, and requires individualized therapies in order to keep it from becoming life-threatening.

Did you know?

About 80% of major fungal systemic infections are due to Candida albicans. Another form, Candida peritonitis, occurs most often in postoperative patients. A rare disease, Candida meningitis, may follow leukemia, kidney transplant, other immunosuppressed factors, or when suffering from Candida septicemia.

Did you know?

Blastomycosis is often misdiagnosed, resulting in tragic outcomes. It is caused by a fungus living in moist soil, in wooded areas of the United States and Canada. If inhaled, the fungus can cause mild breathing problems that may worsen and cause serious illness and even death.

Did you know?

Fatal fungal infections may be able to resist newer antifungal drugs. Globally, fungal infections are often fatal due to the lack of access to multiple antifungals, which may be required to be utilized in combination. Single antifungals may not be enough to stop a fungal infection from causing the death of a patient.

Large regions of the Boreal forest in Alberta have been divided into a grid due to industrial develo Large regions of the Boreal forest in Alberta have been divided into a grid due to industrial develo
Plant Plant
Fat Soluble and Water Soluble Fat-soluble vitamins Fat Soluble and Water Soluble Fat-soluble vitamins
The Equinox Fabrication Plant suffered a fire incident in August, and most of the records for ... The Equinox Fabrication Plant suffered a fire incident in August, and most of the records for ...
Shoot meristems in plant growth Shoot meristems in plant growth
Video: Structure of a Ribosome

For a complete list of videos, visit our video library