Homework Help is Here – Start Your Trial Now!
Science
Chemistry
Step 4. Separation of and testing for Hg,2* and Ag*. To the solid from step 2, add 2 mL of 6 M NH,OH. Agitate and centrifuge. A gray to black solid indicates the presence of Hg22* in the original solution. Decant the liquid (if solid was present). Add concentrated HNO3 dropwise until blue litmus paper turns red. A white precipitate indicates the presence of Ag*.

Step 4. Separation of and testing for Hg,2* and Ag*. To the solid from step 2, add 2 mL of 6 M NH,OH. Agitate and centrifuge. A gray to black solid indicates the presence of Hg22* in the original solution. Decant the liquid (if solid was present). Add concentrated HNO3 dropwise until blue litmus paper turns red. A white precipitate indicates the presence of Ag*.

Chemistry: Principles and Practice
Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter14: Chemical Equilibrium
Section: Chapter Questions
Problem 14.97QE: According to the Resource Conservation and Recovery Act (RCRA), waste material is classified as...
See similar textbooks
icon
Related questions
Question
Group I Cations A 1. Explain why litmus paper is used in step 4. Why is blue litmus paper used rather than red litmus paper?
Transcribed Image Text:Group I Cations A 1. Explain why litmus paper is used in step 4. Why is blue litmus paper used rather than red litmus paper?
Group I Cations of 6 M HCI; centrifuge for ~1 minute. Decant the solution and add an additional one or two drops of 6 M HCI; if no additional precipitate forms, the precipitation is complete. If it was incomplete, centrifuge to obtain the additional solid; then decant the liquid, add 1 or 2 drops of 6 M HCI, and repeat the procedure until no precipitate forms. Discard the supernatant into the appropriate waste container or keep for later experiments if your instructor so indicates. Add 1.5 mL of cold deionized or distilled water to the precipitate to wash; agitate, centrifuge, and discard the water to the appropriate waste container. Repeat the wash procedure. The solid contains Pb2*, Ag*, and/or Hg22*. Step 2. Separation of Pb2*. Add 1 mL of boiling water to the solid from step 1. Agitate, centrifuge, and decant the liquid. Repeat the extraction, combining the supernatant. The liquid should contain Pb?* if any is present. Step 3. Testing for Pb2*. Add 2 or 3 drops of 0.2 M K2CRO4 solution to the combined supernatant from step 2. Formation of a yellow solid (PbCrO4) indicates the presence of Pb2*. Step 4. Separation of and testing for Hg,2* and Ag*. To the solid from step 2, add 2 mL of 6 M NH,OH. Agitate and centrifuge. A gray to black solid indicates the presence of Hg2* in the original solution. Decant the liquid (if solid was present). Add concentrated HNO3 dropwise until blue litmus paper turns red. A white precipitate indicates the presence of Ag*.
Transcribed Image Text:Group I Cations of 6 M HCI; centrifuge for ~1 minute. Decant the solution and add an additional one or two drops of 6 M HCI; if no additional precipitate forms, the precipitation is complete. If it was incomplete, centrifuge to obtain the additional solid; then decant the liquid, add 1 or 2 drops of 6 M HCI, and repeat the procedure until no precipitate forms. Discard the supernatant into the appropriate waste container or keep for later experiments if your instructor so indicates. Add 1.5 mL of cold deionized or distilled water to the precipitate to wash; agitate, centrifuge, and discard the water to the appropriate waste container. Repeat the wash procedure. The solid contains Pb2*, Ag*, and/or Hg22*. Step 2. Separation of Pb2*. Add 1 mL of boiling water to the solid from step 1. Agitate, centrifuge, and decant the liquid. Repeat the extraction, combining the supernatant. The liquid should contain Pb?* if any is present. Step 3. Testing for Pb2*. Add 2 or 3 drops of 0.2 M K2CRO4 solution to the combined supernatant from step 2. Formation of a yellow solid (PbCrO4) indicates the presence of Pb2*. Step 4. Separation of and testing for Hg,2* and Ag*. To the solid from step 2, add 2 mL of 6 M NH,OH. Agitate and centrifuge. A gray to black solid indicates the presence of Hg2* in the original solution. Decant the liquid (if solid was present). Add concentrated HNO3 dropwise until blue litmus paper turns red. A white precipitate indicates the presence of Ag*.
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Gravimetric Analysis
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Chemistry: Principles and Practice
Chemistry: Principles and Practice
Chemistry
ISBN:
9780534420123
Author:
Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:
Cengage Learning
EBK A SMALL SCALE APPROACH TO ORGANIC L
EBK A SMALL SCALE APPROACH TO ORGANIC L
Chemistry
ISBN:
9781305446021
Author:
Lampman
Publisher:
CENGAGE LEARNING - CONSIGNMENT
Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
Chemistry
ISBN:
9781305079373
Author:
William L. Masterton, Cecile N. Hurley
Publisher:
Cengage Learning
Chemistry
Chemistry
Chemistry
ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning
Chemistry: An Atoms First Approach
Chemistry: An Atoms First Approach
Chemistry
ISBN:
9781305079243
Author:
Steven S. Zumdahl, Susan A. Zumdahl
Publisher:
Cengage Learning
Chemistry
Chemistry
Chemistry
ISBN:
9781133611097
Author:
Steven S. Zumdahl
Publisher:
Cengage Learning
SEE MORE TEXTBOOKS