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 nitrate and sodium hydroxide precipitate

03/12/2021 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:

Professor Smith
Quality Assignments
Quick Mentor
Finance Homework Help
Math Guru
Top Grade Tutor
Writer Writer Name Offer Chat
Professor Smith

ONLINE

Professor Smith

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

$46 Chat With Writer
Quality Assignments

ONLINE

Quality Assignments

I am a PhD writer with 10 years of experience. I will be delivering high-quality, plagiarism-free work to you in the minimum amount of time. Waiting for your message.

$35 Chat With Writer
Quick Mentor

ONLINE

Quick Mentor

I am an elite class writer with more than 6 years of experience as an academic writer. I will provide you the 100 percent original and plagiarism-free content.

$38 Chat With Writer
Finance Homework Help

ONLINE

Finance Homework Help

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.

$20 Chat With Writer
Math Guru

ONLINE

Math Guru

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

$32 Chat With Writer
Top Grade Tutor

ONLINE

Top Grade Tutor

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

$29 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

NURS340REPLY - Power Point-3 Team Management - 1000 milliliters to liters - Three types of rna involved in protein synthesis - Bbc dance mat touch typing - Conservation of mass demonstration - POST PSY341 UNIT 8 FINAL EXAM 50 answers - Guelph general hospital case study solution - COMPLETE Paraphrase Required for Zero Percent Plagiarism - Need in 8 hours Max - Panera bread core competencies - Organ sales will save lives norton - The humanities volume 1 7th edition pdf - Survey of Partial Differential Equations - Rapid electronics christmas tree kit - ETHICS - Replacement of hydrogen by a metal lab - Vision and Mission Statement - Case Study 2: The Job That Was Too Good to Be True - Week 6 discussion - Figure weights wisc v description - Symantec erp turmoil case study - Electrical safety certificate template - 5 star writing checklist - Nova mind of a rampage killer worksheet answers - Report on Ebola Epidemic in West Africa 2014 - Eight crazy nights script - Maurice turnor gardner llp - Kelly tool vs halligan - Electrolysis the faraday and avogadro's number - Waltz mendoza sequence dance - The yellow wallpaper mla citation - Ben and jerry's vision statement - Lns bar feeder service password - The peasant the buffalo and the tiger moral lesson - What is the primary narrator in every movie - Roland barthes from work to text analysis - Blood spatter lab answers - Thesis Plan and Schedule - Mountain view realty excel assignment answers - A geodesic dome constructed with an aluminum framework - Mission statement of four seasons hotel - Does prospero free caliban - Best interest case practice model - Triangulation mapping crime scene - What are the resulting phenotypes - 5.9 online shopping cart java - What is expansion path in economics - Payment - Several Big Data Visualization tools - Telstra byo mobile plans $39 - Who's the spy for the greasers - What is metadata which component of a dbms maintains metadata - Research Paper - Unit 21 assignment 1 - 3f 4f weld test - Data-driven decision making - 600 dis - 89 lawrence vale road south launceston - Official beer pong rules - Center for positive organizational scholarship - Osmosis a way of preserving food - Four nursing metaparadigms branch - Remic mortgage agent course - Gold coast planning scheme - 9780133741322 - Andalusian horse for sale florida - A rain gutter is formed by bending up the sides - LD4 - Digital Designers - 18 walton street streatham vic 3351 - When did cyclone yasi hit - Caboolture hospital mental health - National standards for mental health services 2010 - What fire extinguisher not to use on electrical - Cultural anthropology in a globalizing world - English 6 - Volkswagen in russia case study - Hr discussion - Authentic leadership self-assessment questionnaire - Project team leadership presentation cpmgt 300 - John hopkins research evidence appraisal tool - Me and you barry louis polisar ukulele chords - Sicko movie worksheet answers - Commbank stamp duty calculator - Interactive chart of nuclides - Business Ethic Questions 100 words needed each - Nursing - Clp 1006 - Clara simpson fitness - Where does dr harry cooper live now - Dorothy day civil disobedience - Forensic Accounting - Discussion Post - When pursuing a market development strategy, expanding into international markets is generally - Epidemiology for public health practice study guide - InfoTech Import in Strat Plan (ITS-831) - The self unseeing analysis - Evolution of nursing education - Lee medical abbreviation eye - 06.02 the industrial revolution graphic organizer - Originally carol ann duffy