Loading...

Messages

Proposals

Stuck in your homework and missing deadline? Get urgent help in $10/Page with 24 hours deadline

Get Urgent Writing Help In Your Essays, Assignments, Homeworks, Dissertation, Thesis Or Coursework & Achieve A+ Grades.

Privacy Guaranteed - 100% Plagiarism Free Writing - Free Turnitin Report - Professional And Experienced Writers - 24/7 Online Support

Flame test lab answers conclusion

13/11/2021 Client: muhammad11 Deadline: 2 Day

Ashley Heaney

Lab 9 Anions, Cations, and Ionic Reactions

5 April 2016

Chemistry 1105

Lab 9 Anions, Cations, and Ionic Reactions

Ashley Heaney

6 April 2016

Contemporary Chemistry 1105

Purpose

The purpose of this lab is to identify anions and cations through flame tests and displacement reactions.

Procedure

After gathering all of the required materials, follow the procedure and safety guidelines to complete the lab.

1. Be sure to put on your gloves and safety goggles.

2. Place a 24 well plate in your work area. Using scissors. Cut off the tips of the six pipets labeled, Bromide, Carbonate, Chloride, Iodide, Sulfate and Sulfide. Use the well plate to hold the pipets.

3. In the well directly in front of the pipet, put 8 drops of bromide.

4. Add 1 drop of silver nitrate to the bromide. Wait a few seconds. Make and record your observations of the reaction between the bromide and silver nitrate in Data Table 1 under the column “Addition of AgNO3”.

5. In the same well, add 2 drops of HCI. Wait a few seconds. Make and record your observation in Data Table 1 under the column “Addition of HCl”.

6. Repeat steps 3 – 5 for the remaining 5 chemicals (not the unknown) and record your observations in Data Table 1.

7. Put 8 drops of the unknown in #103 in an empty well.

8. Add 1 drop of silver nitrate to the Unknown #103. Wait a few seconds. Make and record your observation in Data Table 1 under the column titles “Addition of AgNO3”.

9. Add 2 drops of HCl to the same well. Wait a few seconds and make and record your observations in Data Table 1 under “Addition of HCl”.

10. Compare the anion tests for the Unknown #103 to determine the identity of the unknown anion. Record your findings in Data Table 1in the “Anion” column next to “Unknown #103”

11. Repeat steps 7 – 10 for Unknown #104

12. Place the well plate aside along with the chemicals. It will be used in Exercise 2.

Exercise 2

1. Be sure to put on you goggles and safety gloves.

2. Put the burner fuel on the pie plate, take the lid off of the burner and light the wick.

3. Read all of the steps in this exercise before completing step 5.

4. Using a spatula, hold a pea size amount of Kl on the end.

5. With the KI on the end of the spatula, hold the end of the spatula in the flame. Keep the spatula in the flame until you see a reaction. This could take up to 2 minutes.

6. Continue to observe the flame until the flame changes. Record your observations in Data Table 2. When complete take the spatula out of the flame and allow it to cool.

7. Rinse the spatula once it has cooled. Be sure to remove any chemical residue. Repeat steps 5 – 6 for the remainder of the chemicals listed in the Data Table 2.

8. Repeat steps 5-6 for Unknown #105. Compare the color of the flame to the Data Table 2. Determine the identity and record your findings in Data Table 2.

9. Repeat steps 5-6 for Unknown #106 and unknown #107

10. Put out the flame out by carefully putting the cap on the flame.

11. Get the well plate used in Exercise 1, distilled water and an empty pipet.

12. Use the results in Data Table 2 to fill in the identification of the cation for Unknown #105, Unknown #106 and Unknown #107 in Data Table 3.

13. In an empty well, place a pea-sized amount of unknown #105.

14. Using the pipet, add 4 drops of distilled water onto the chemical.

15. Preform the anion confirmation test for Unknown #105. Use what you learned in Exercise 1. Record what you observe into Data Table 3.

16. Compare the observations for unknown #105 to the data in Data Table 1, determine the identity and record it in Data Table 3.

17. Combine the determined identity of the cation and anion for Unknown #105 to determine the complete chemical identity of Unknown #105. Record in Data Table 3.

18. Repeat Steps 13-17 for Unknown #106 and Unknown #107.

19. Clean up and return items back to the kit to be used again.

Observations

Exercise 1: Qualitative Anion Tests

Data Table 1. Anion Confirmation Tests.

Chemical

Anion

Addition of AgNO3

Addition of HCl

NaBr

Bromide

It became white and a little cloudy

Still cloudy and still white

Na2CO3

Carbonate

Cloudy and white around the outside and clear on the inside

Still cloudy, bubbles start to form, white

NaCl

Chloride

Cloudy and white at the bottom and clear on top

No change. Clear on top cloudy on bottom

NaI

Iodide

Dark in the middle, cloudy and lighter around the edged

Started to separate

Na2SO4

Sulfate

Clear

White and Cloudy

Na2S

Sulfide

Turned brown in the middle, began to separate

The brown becomes more separate from the clear

Unknown #103

CO3^2

Small particles

Bubbles form, white and cloudy

Unknown #104

S^2

Brown in middle clear around

Some brown disappeared

Exercise 2: Qualitative Cation Tests – Flame

Data Table 2. Cation Flame Tests.

Chemical

Cation

Flame Observations

KI

Potassium

Light Pink

CaCl2

Calcium

Red

LiOH

Lithium

Vibrant Pink

NaCl

Sodium

Orange

Cu(NO3)2

Copper

Teal

Unknown #105

Copper

Teal

Unknown #106

Potassium

Light Pink

Unknown #107

Calcium

Red

Data Table 3. Complete Chemical Identification.

Chemical

Cation

Anion Test Observations

Anion

Complete Chemical Name and Formula

Unknown #105

Copper

With AgNO3: No Change

CO3^2

Copper(lll) nitrate, Cu(NO3)2

Unknown #106

Potassium

With AgNO3: In the middle very dark and cloudy. Fades lighter white

l-

Potassium iodide, Kl

Unknown #107

Calcium

With AgNO3: Turn white cloudy

Cl-

Calcium Chloride,CaCl2

Questions

A. What was the identity of the anion in Unknown #103? Explain how you used the observations recorded in Data Table 1 to reach this conclusion.

The anion in Unknown #103 was carbonate. I compared my observations in Data Table 1 and both Unknown #103 and carbonate had the same reactions.

B. What was the identity of the anion in Unknown #104? Explain how you used the observations recorded in Data Table 1 to reach this conclusion.

The anion in Unknown #104 is sulfide. I compared my observations in Data Table 1 to the observation of Unknown #104 and saw that 104 matched with sulfide.

C. Write the chemical equation for ionic reaction between Na2S and AgNO3.

AgNO3 + Na2S ==> Ag2S + NaNO3

D. Write the chemical equation for ionic reaction between NaBr and AgNO3.

AGNO3 + NABR = NANO3 + AGBR

E. Use your results and observations in Data Table 1 to create a flow chart for identification of unknown anions, using the AgNO3 and HCl confirmation tests. Insert the flow chart below.

Solution containing: Br-, CO3^2-, Cl-, I-, SO4^2-, and S^2

{AgBr(cloudy), Ag2CO3(cloudy), AglCloudy),Agl(very dark), Ag2S-(brown)} {So4^2-}

AgBr(cloudy), AgCl(cloudy), Agl(very cloudy), Ag2S(brown)} {CO3^2-(decomposes to give

CO2 gas)}

F. What was the identity of the cation in Unknown #105? Explain how you used the observations recorded in Data Table 1 to reach this conclusion.

After comparing results I can conclude that Unknown #105 is copper. The color is how I determined my final answer.

G. Use your results and observations in Data Tables 1, 2, and 3, to create a flow chart for the identification of an unknown (both an unknown anion and cation), using the AgNO3 and HCl confirmation tests and the cation flame tests.

H. If you were asked to confirm the identity of an unknown chemical as lithium sulfide (Li2S), describe the tests that you would use to confirm the identity. Use your results in both Exercise 1 and Exercise 2 to describe the observations in both the cation and anion tests that would allow the unknown to be confirmed as lithium sulfide.

I would conduct the tests that were used in this lab. I would put the unknown chemical in a well and add HCl. I would then record my observations. I would then conduct the flame test. After analyzing my observations I should be able to positively identify the chemical.

Conclusion

It is always interesting to conduct tests with known chemicals and then conducting tests on unknown chemicals to find out what we are working with / testing. I enjoy working with chemicals and reactions that turn into colors rather then just get cloudy.

Homework is Completed By:

Writer Writer Name Amount Client Comments & Rating
Instant Homework Helper

ONLINE

Instant Homework Helper

$36

She helped me in last minute in a very reasonable price. She is a lifesaver, I got A+ grade in my homework, I will surely hire her again for my next assignments, Thumbs Up!

Order & Get This Solution Within 3 Hours in $25/Page

Custom Original Solution And Get A+ Grades

  • 100% Plagiarism Free
  • Proper APA/MLA/Harvard Referencing
  • Delivery in 3 Hours After Placing Order
  • Free Turnitin Report
  • Unlimited Revisions
  • Privacy Guaranteed

Order & Get This Solution Within 6 Hours in $20/Page

Custom Original Solution And Get A+ Grades

  • 100% Plagiarism Free
  • Proper APA/MLA/Harvard Referencing
  • Delivery in 6 Hours After Placing Order
  • Free Turnitin Report
  • Unlimited Revisions
  • Privacy Guaranteed

Order & Get This Solution Within 12 Hours in $15/Page

Custom Original Solution And Get A+ Grades

  • 100% Plagiarism Free
  • Proper APA/MLA/Harvard Referencing
  • Delivery in 12 Hours After Placing Order
  • Free Turnitin Report
  • Unlimited Revisions
  • Privacy Guaranteed

6 writers have sent their proposals to do this homework:

Online Assignment Help
Math Guru
Phd Writer
Top Quality Assignments
Custom Coursework Service
Instant Homework Helper
Writer Writer Name Offer Chat
Online Assignment Help

ONLINE

Online Assignment Help

After reading your project details, I feel myself as the best option for you to fulfill this project with 100 percent perfection.

$47 Chat With Writer
Math Guru

ONLINE

Math Guru

This project is my strength and I can fulfill your requirements properly within your given deadline. I always give plagiarism-free work to my clients at very competitive prices.

$27 Chat With Writer
Phd Writer

ONLINE

Phd Writer

I will provide you with the well organized and well research papers from different primary and secondary sources will write the content that will support your points.

$45 Chat With Writer
Top Quality Assignments

ONLINE

Top Quality Assignments

I find your project quite stimulating and related to my profession. I can surely contribute you with your project.

$45 Chat With Writer
Custom Coursework Service

ONLINE

Custom Coursework Service

I find your project quite stimulating and related to my profession. I can surely contribute you with your project.

$37 Chat With Writer
Instant Homework Helper

ONLINE

Instant Homework Helper

I have done dissertations, thesis, reports related to these topics, and I cover all the CHAPTERS accordingly and provide proper updates on the project.

$25 Chat With Writer

Let our expert academic writers to help you in achieving a+ grades in your homework, assignment, quiz or exam.

Similar Homework Questions

Wolf of wall street chapter summary - Cwa 4.4 origins of the vietnam war quiz answers - Assignment - What colour does barium burn - 2st radio frequency fm - Political arguments for government intervention in international trade - Https www youtube com watch v gf81d0ys58e - Cover letter after career break - Emerging threats and countermeasures - Bye rupert chrome extension - Iso 9001 2015 management review example pdf - Centrair air systems & supplies - A pediatrician uses the model above - Network management research paper - Define home management - A cement manufacturer has supplied the following data - Activity diagram for patient management system - Change management principles methodologies and tools - Quadratic relations grade 10 - One canada square floors - The miller of the dee - Monklands hospital orthopaedic consultants - Importance of continuing education for nurses - Discussion Question - Australian ethical emerging companies - Names of protists and pictures - Safety map worksafe victoria - Brian foster shadow health assessment - Informative speech about healthy eating - What does the phrase the withered leaves of industrial enterprise - Red bull case study answers - Film ESSAY PAPER - Cambridge igcse english literature - Altex corporation case study - Limiting and excess reactants worksheet answers race car - Michelin fleet solutions vs the conventional tire selling model - Epidemiology for public health practice test bank - Assignment - Carbonic acid and potassium hydroxide net ionic equation - Important scenes in v for vendetta - How to memorize ions - Persuasive essay outline worksheet - Health and wellbeing responsibility of all poster - Electron configuration for neon - Tylenol case study analysis - Walmart china supply chain transformation - Handicare 2000 stairlift manual - Security architecture 9 - Tesla balanced scorecard - The blind side awards - Assume that hybridization experiments are conducted with peas - Black and decker router 7614 type 3 manual - How to find volume of an irregular shaped object - Uk driving licence template photoshop free - Defense mechanisms worksheet answers - Powerpoint presentation - Criminal podcast money tree worksheet answers pdf - Who was to blame for the peterloo massacre - Ashley purchased a dining room set for - How to do cash flows on financial calculator - La señora castillo el centro - Peugeot car club australia - Ca oh 2 co2 reaction - Psig to psia formula - Nc rules for writers launchpad custom - Penn foster math answers - Gcu library online - Business continuity plan template australia - Scientific method pill bug lab - Public Administration Unit 5 Discussion - Bsbhrm405 assessment answers - Sense Assignment - Bus topology cable type - Dr seuss informational text - Amazon writing exercise time limit - Icd 10 code for left tibial plateau fracture - Umesh maheshwari nimble storage - Leyland martian artillery tractor - Values are important to human service professionals because they - Walker and avant concept analysis steps - Warnerwoods company uses a perpetual inventory system. it entered into the following purchases - Majumder v attorney general of sarawak - 1988 ap calculus ab multiple choice answers - Analysed cash book junior cert questions - Wade davis ted talk endangered cultures - A lack of cooperation by oligopolists trying to maintain monopoly profits - ASSIGNMENT 3 - Stats test 18 questions 75mins to do - Thermostats - Animal pelt crossword clue - Self-Reflection - Apply: Signature Assignment: SDLC Presentation - Emotional intelligence in social work practice - Why is the narrator in billy collins marginalia so tickled - Intro to psychology top hat interactive text - Titan mitts link between two worlds - 17 elements of iso 14001 - How to improve psrr of ldo - Newcrest mining annual report 2017 - 1 2 3 4 5 in roman numerals