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

Author Question: A precipitate forms when a solution that is 0.10 M in Cu2+, Pb2+, and Ni2+ is saturated with H2S and ... (Read 85 times)

ereecah

  • Hero Member
  • *****
  • Posts: 530
on: Aug 23, 2018
A precipitate forms when a solution that is 0.10 M in Cu2+, Pb2+, and Ni2+ is saturated with H2S and adjusted to pH = 1. What sulfides are present in the precipitate?
  H2S = 0.10 M; for H2S, Ka1  Ka2 = 1.1  1024
  Ksp: CuS = 8.5  1045, PbS = 7.0  1029, NiS = 3.0  1021
   
  a.
  CuS, PbS, and NiS
   
  b.
  PbS and NiS
   
  c.
  NiS
   
  d.
  CuS and PbS
   
  e.
  CuS

Question 2

The concentration of Mg2+ in seawater is 0.052 M. At what pH will 99 of the Mg2+ be precipitated as the hydroxide? Ksp for Mg(OH)2 = 8.9  1012
   
  a.
  8.35
   
  b.
  9.22
   
  c.
  6.50
   
  d.
  10.12
   
  e.
  4.86

Question 3

If 30 mL of 5.0  104 M Ca(NO3)2 are added to 70 mL of 2.0  104 M NaF, will a precipitate occur? (Ksp of CaF2 = 4.0  1011)
   
  a.
  No, because the ion product is greater than Ksp.
   
  b.
  Yes, because the ion product is less than Ksp.
   
  c.
  No, because the ion product is less than Ksp.
   
  d.
  Not enough information is given.
   
  e.
  Yes, because the ion product is greater than Ksp.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

kswal303

  • Sr. Member
  • ****
  • Posts: 316
Reply #1 on: Aug 23, 2018
Answer to Question 1

d

Answer to Question 2

d

Answer to Question 3

c


ereecah

  • Member
  • Posts: 530
Reply 2 on: Aug 23, 2018
YES! Correct, THANKS for helping me on my review

cam1229

  • Member
  • Posts: 329
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.

Did you know?

Many supplement containers do not even contain what their labels say. There are many documented reports of products containing much less, or more, that what is listed on their labels. They may also contain undisclosed prescription drugs and even contaminants.

Did you know?

One way to reduce acid reflux is to lose two or three pounds. Most people lose weight in the belly area first when they increase exercise, meaning that heartburn can be reduced quickly by this method.

Did you know?

For high blood pressure (hypertension), a new class of drug, called a vasopeptidase blocker (inhibitor), has been developed. It decreases blood pressure by simultaneously dilating the peripheral arteries and increasing the body's loss of salt.

Did you know?

Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).

Distribution and Forms of Precipitation: Freezing Rain Distribution and Forms of Precipitation: Freezing Rain
Three active forms of vitamin A: all-trans-retinol, -retinal, and –retinoic acid Three active forms of vitamin A: all-trans-retinol, -retinal, and –retinoic acid
Binding of the estrogen receptor to DNA, as inferred from solution NMR spectroscopy Binding of the estrogen receptor to DNA, as inferred from solution NMR spectroscopy
Delta Method Solution Delta Method Solution
An analytical procedure requires a solution of chloride ions. How many grams of MgCl2 must be ... An analytical procedure requires a solution of chloride ions. How many grams of MgCl2 must be ...
The right- and left-handed helical forms of DNA The right- and left-handed helical forms of DNA
Video: Stroke volume - afterload definition & hypertension

For a complete list of videos, visit our video library