Homework Help is Here – Start Your Trial Now!
Science
Chemistry
A student mistakenly added conce

A student mistakenly added conce

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
See similar textbooks
icon
Related questions
Question
4. A student mistakenly added concentrated (12M) HCI to a sample of unknown, instead of adding 6M HCI, as directed. (1) At first, a large amount of light-colored pre- cipitate formed, but some dissolved on further addi- tion of concentrated HCI. Write an equation(s) for the reaction(s) that might have occurred. (2) The precipitate was separated from the supernatant liquid in (1) and was found to be insoluble in hot water. The precipitate turned grey-black upon addition of 6M NH2. The student concluded that the unknown contained Hg,2+ ion. The student received ona low mark on the experiment, because the unknown actually contained all three Group I cations. Explain what happened.
Transcribed Image Text:4. A student mistakenly added concentrated (12M) HCI to a sample of unknown, instead of adding 6M HCI, as directed. (1) At first, a large amount of light-colored pre- cipitate formed, but some dissolved on further addi- tion of concentrated HCI. Write an equation(s) for the reaction(s) that might have occurred. (2) The precipitate was separated from the supernatant liquid in (1) and was found to be insoluble in hot water. The precipitate turned grey-black upon addition of 6M NH2. The student concluded that the unknown contained Hg,2+ ion. The student received ona low mark on the experiment, because the unknown actually contained all three Group I cations. Explain what happened.
Expert Solution
steps

Step by step

Solved in 3 steps

SEE SOLUTIONCheck out a sample Q&A here
Blurred answer
Knowledge Booster
Measurement
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.
Recommended textbooks for you
Chemistry
Chemistry
Chemistry
ISBN:
9781305957404
Author:
Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:
Cengage Learning
Chemistry
Chemistry
Chemistry
ISBN:
9781259911156
Author:
Raymond Chang Dr., Jason Overby Professor
Publisher:
McGraw-Hill Education
Principles of Instrumental Analysis
Principles of Instrumental Analysis
Chemistry
ISBN:
9781305577213
Author:
Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:
Cengage Learning
Organic Chemistry
Organic Chemistry
Chemistry
ISBN:
9780078021558
Author:
Janice Gorzynski Smith Dr.
Publisher:
McGraw-Hill Education
Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
Chemistry
ISBN:
9781305079373
Author:
William L. Masterton, Cecile N. Hurley
Publisher:
Cengage Learning
Elementary Principles of Chemical Processes, Bind…
Elementary Principles of Chemical Processes, Bind…
Chemistry
ISBN:
9781118431221
Author:
Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:
WILEY
SEE MORE TEXTBOOKS