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

Silver carbonate on heating gives

29/10/2021 Client: muhammad11 Deadline: 2 Day

LAB EXPERIMENT 1

OBSRVATIONS OF CHEMICAL CHANGES

PURPOSE OF EXPERIMENT

The purpose of the experiments were to observe chemical changes on various chemicals. The experiment was to distinguish between burning and heating.

PROCEDURE

A few drops of hydrochloric acid were dropped in a product labelled sodium hydrogen carbonate. Silver nitrate solution was also reacted with aqueous sodium hydroxide solution.

Magnesium metal, zinc metal, copper carbonate and copper nitrate were heated in one experiment separately and then burned.

OBSERVATIONS

When sodium hydrogen carbonate was reacted with hydrochloric acid, there was no color change. However, bubbling and fizzling occurred. The test for starch with IKI indicator resulted in a blue-black color of the solution. Reaction of potassium iodide with lead nitrate solution produced a yellow color. When phenolphthalein indicator was added to a solution of sodium hydroxide, there was a color change to bright pink. The indicator did not result in any color change when it was added to hydrochloric acid.

Reaction of silver nitrate and sodium hydroxide resulted into a light brown, black starches. Silver nitrate reacted with aqueous ammonia, and the observation was a white and cloudy solution formed. When the solution was absorbed into a paper towel and exposed to sunlight, color changed to brown and rusty. When aqueous ammonia was reacted with copper (II) sulphate, a blue solution was formed.

Reactant A

Reactant B

Observation

sodium hydrogen carbonate

hydrochloric acid

No color change

bubbling and fizzling

Starch

IKI indicator

a blue-black color

potassium iodide

lead nitrate solution

yellow color

phenolphthalein indicator

sodium hydroxide

color change to bright pink

phenolphthalein indicator

Hydrochloric acid.

No color change

silver nitrate

sodium hydroxide

light brown, black starches

Silver nitrate

aqueous ammonia

a white and cloudy solution. When the solution was absorbed into a paper towel and exposed to sunlight, color changed to brown and rusty

copper (II) sulphate

aqueous ammonia

blue solution

Magnesium metal was silver and shiny. After heating, it glowed bright red and became a white ash. Zinc metal which is rock-like and silvery melted into liquid after heating. Copper carbonate turned black upon heating while copper (II) nitrate melted and turned green, and lots of fizzing and gas were released, it finally turned black, however.

Substance

Heating

Burning

Magnesium metal

glowed bright red and became a white ash

Glowed red, then turned into a bright white flame, then turned into ash

Zinc metal

melted into liquid

Melted into a liquid, glowed red

Copper carbonate

turned black

The flame glowed blue and the powder turned black

copper (II) nitrate

Melted and turned green, and lots of fizzing and gas were released, it finally turned black, however.

The flame glowed green, and the crystals bubbled and turned black

LAB ANSWERS

Exercise 1.

1. In order to test whether a lab product contained sodium hydrogen carbonate, a few drops of hydrochloric acid would be added. If there is fizzing and bubbling of a gas, the household product is then sodium hydrogen carbonate.

2. The chemical equation for reaction between silver nitrate and sodium hydroxide is:

3. The reaction which produced the products was the one between hydrochloric acid and sodium hydrogen carbonate. There was fizzing and bubbling of gas due to production of

4. Since the sample with a faint odor turned pink, I would say that it is sodium hydroxide. Vinegar is made up to acetic acid, and phenolphthalein doesn’t cause a color change in acids.

5. The fifth cookie brand which gives a yellow-brown color does not have as much starch as compared to the other brands.

6. In order to confirm presence or absence of lead, some drops of the hair tonic would be dropped into some potassium iodide. If the solution is yellow, then there is some lead in the hair tonic.

7. Cutting a cake into 8 pieces is a physical change. This is because no new substance is formed.

8. When soda is poured into glass and the soda bubbles, it is a result of chemical change. This is because a gas is released, meaning that a certain substance in the soda has transformed.

9. In well B1, specifically in the second step, the reactant was direct sunlight. This is a chemical reaction because it turned color of dark brown similar to rust on the paper towel meaning a new substance was formed.

10. Phenolphthalein acts well as an acid/base indicator. The observation in A5 do support this statement. This is because HCl doesn’t change whereas the base turns to pink.

Exercise 2

1. The similarities of burning and heating magnesium are that there was a chemical change, resulting in the metal burning and producing ash. The difference is that when burned, magnesium burst into a bright white light while heating it made it to glow red and turn into ashes.

2. There were no differences observed in heating and burning of zinc metal. There was chemical change in burning since it only melted into a liquid.

3. Heating copper carbonate turned the powder into black and a powder was released. Burning it also resulted into formation of a black substance. There was a chemical change in both heating and burning.

4. Heating and burning copper nitrate was exactly the same. However, a glowing flame was absent when heating. There was a chemical change in burning.

5. The differences between heating and burning are that heating adds thermal energy while burning is a chemical reaction called oxidation.

6. Chemical producing a physical change was mossy zinc (it melted into liquid.

CONCLUSIONS

When two chemicals react, a product is formed and the two chemicals are said to have undergone a chemical change. This is because they have been transformed. Physical change only involves change of state. Chemicals react differently to both heating and burning. More differences are observed when heating the chemicals, however.

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:

Instant Homework Helper
Write My Coursework
Engineering Mentor
Chartered Accountant
Top Grade Essay
Quick Mentor
Writer Writer Name Offer Chat
Instant Homework Helper

ONLINE

Instant Homework Helper

As an experienced writer, I have extensive experience in business writing, report writing, business profile writing, writing business reports and business plans for my clients.

$27 Chat With Writer
Write My Coursework

ONLINE

Write My Coursework

I can assist you in plagiarism free writing as I have already done several related projects of writing. I have a master qualification with 5 years’ experience in; Essay Writing, Case Study Writing, Report Writing.

$23 Chat With Writer
Engineering Mentor

ONLINE

Engineering Mentor

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.

$19 Chat With Writer
Chartered Accountant

ONLINE

Chartered Accountant

I am a professional and experienced writer and I have written research reports, proposals, essays, thesis and dissertations on a variety of topics.

$16 Chat With Writer
Top Grade Essay

ONLINE

Top Grade Essay

Being a Ph.D. in the Business field, I have been doing academic writing for the past 7 years and have a good command over writing research papers, essay, dissertations and all kinds of academic writing and proofreading.

$39 Chat With Writer
Quick Mentor

ONLINE

Quick Mentor

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.

$42 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

A tiger leaps horizontally from a - Nursing intervention for fracture - Communication - Interest rate parity theory ppt - Stiff fabric used in bookbinding - Domain of cube root - I need help with finishing the final draft for my paper assignment - St dominic de guzman - Zigby manufacturing production budget - Lab 8 ideal gas law answers - An example of a formal letter - 16 wilson road arthurs seat - We were liars movie - AIS - Sustainability management - Malaysia lightning protection standard - Ava test personality - Emc vnxe default service password - Effective Leadership and Power - 200 Words - Python lists are commonly used to store data types. Lists are a collection of information typically called a container. - Nova labs the evolution lab answer key mission 3 - Cheap seating area in a theatre crossword - Q & Q A6 - Eric ogbogu net worth - Paralleling technique vs bisecting technique - List the steps of the accounting cycle - Periodic table structure worksheet - Wakefield intermediate care unit - Ielts information for candidates booklet - Discussion: Evaluating Use of Literature and Problem Statement - Renaissance and mannerism in cinquecento italy - Graduate Education Assistance - Sample six sigma project report - Area where bowler stands - ERM Integration - Eaton ups battery test - Health IT Benefits and Risks Reflection - The pleasure of my company - Which poet first popularized the sonnet form - 355 n carolwood dr - Chemical principles the quest for insight pdf freechemical principles the quest for insight pdf freechemical principles the quest for insight pdf freechemical principles the quest for insight pdf freechemical principles the quest for insight pdf freechemical principles the quest for insight pdf free - Data Mining Project - Is no2- polar or nonpolar - Operational Excellence Project Portfolio - One man brake bleeder autozone - Competitive priorities in operations management - George orwell 1984 chapter 1 questions - Purchase order process flow chart - Who was to blame for the peterloo massacre - Dyson brand positioning - Lvr home loan meaning - Is kiwisaver compulsory for employees - Sea la vie portsmouth - HRM/300T: Fundamentals Of Human Resource Management - Neal street medical centre - The healthcare quality book 3rd edition ebook - Job description of community health nurse ppt - Presentation - What is a sizzling start - Sdd hsc past papers - 365 post and responses - What event signified the beginning of the ancient church - Silent partner jazz stringing machine - Credit card size in pixels photoshop - Need by thursday - Count me in too online - Formal appeal letter template - Module 7 trade terms quiz - Da lite screen cleaning - Rapid storage technology enterprise - Alicia está de buen humor cuando contesta el teléfono. - Freightliner fault code 33 bulkhead - Fossil extinction puddle is to - How is population density expressed - Leadership and management models mgt 410 - Box hill free tafe - Fantastic mr fox excerpt - Independent events venn diagram - The quantities s and t are positive - CCIS - Human Communication - Phi 103 week 4 journal - Trapped in america's safety net sparknotes - What is the magnitude of the component vector a⃗ x shown in the figure? (figure 1) - Case Study : National Collegiate Athletic Association Ethics and Compliance Program - Iodine solution produces no colour with - Educational system in the philippines compared to other countries - Reviewing problems or issues and the cultural assessment - NARESH ORG THEORY Journal Article Summary 4# - Hpe 3par 9450 quickspecs - Why do covalent molecules have low melting points - 2015 qcs writing task - What is the electron configuration for boron - Macrob year 11 entry - Personal Belief Essay - Perceived self and presenting self examples - Excel - Super munchkin card list - Crin o medical term - Jacaranda tree leaf type - An psg 14 v 1 lfed