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 ammonia exposed to light

31/12/2020 Client: saad24vbs Deadline: 7 Days

MOHAMMED ALNAIMI


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:

Top Essay Tutor
University Coursework Help
Helping Hand
Smart Accountants
A Grade Exams
Accounting Homework Help
Writer Writer Name Offer Chat
Top Essay Tutor

ONLINE

Top Essay Tutor

I have more than 12 years of experience in managing online classes, exams, and quizzes on different websites like; Connect, McGraw-Hill, and Blackboard. I always provide a guarantee to my clients for their grades.

$105 Chat With Writer
University Coursework Help

ONLINE

University Coursework Help

Hi dear, I am ready to do your homework in a reasonable price.

$102 Chat With Writer
Helping Hand

ONLINE

Helping Hand

I am an Academic writer with 10 years of experience. As an Academic writer, my aim is to generate unique content without Plagiarism as per the client’s requirements.

$100 Chat With Writer
Smart Accountants

ONLINE

Smart Accountants

I feel, I am the best option for you to fulfill this project with 100% perfection. I am working in this industry since 2014 and I have served more than 1200 clients with a full amount of satisfaction.

$95 Chat With Writer
A Grade Exams

ONLINE

A Grade Exams

Hi, I have read the instructions carefully and I clearly understand what is required of the project. I always make sure I proofread and edit papers well to ensure they are free of typos, plagiarism, and grammar mistakes. Hire me for a timely delivery of a quality content.

$95 Chat With Writer
Accounting Homework Help

ONLINE

Accounting Homework Help

I can help you with your homework & assignments to get A grade. I have helped several students multiple fields such as marketing, SWOT, PESTEL, Finance, Law, Sociology and Psychology. I know how to structure and format content with different writing styles such as MLA, APA, & Harvard. Please try me once at least. You will be satisfied.

$95 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

Geneva college cokes and connections - What is polarity test - Mohawk home edenton folk floral rug - Managerial account - Standard error of measurment - Just another case of that old pta meaning - Deliverable 2 - Kingston-Bryce Business Case - David lester clayton utz - University of virginia health system case study solution - Convert pdf to google doc on chromebook - And then you shoot your cousin full album - Presidential Agendas - Chronic Disease Management - Two paragraphs - Capoeira spinning heel kick - Essentials of negotiation lewicki pdf - Resource levelling and smoothing example - Top ten logical fallacies - Character of luka in the bear - Powertech plus battery charger mb 3611 - Equity audits a practical leadership tool - Discussion 1 - ESSAY "Eight Concerte Steps" Poem - H&m employee dress code - Chlorsig eye ointment side effects - Education as a social institution essay - The reconciliation of the cash register tape - Sherman alexie indian education answers - Science - Turnitin purdue global - Marketers don t create needs needs preexist marketers - Fallen sports heroes media and celebrity culture - Personal Biography Writer in UK - Codependency assessment inventory - The crusades through arab eyes main points - The projection lens in a certain slide projector - Tweeter etc case analysis - Cell theory graphic organizer answer key - Wrightmarshall co uk tarporley - 4 responses with 60 words each (No plag) don't forget to put the initial thanks. - Resource manager and variation - Project charter for online shopping system - Bond energy calculations worksheet - Team Assignment: Organizational Performance Management Presentation - Calcium carbonate and water reaction equation - Allegany college blackboard - Deliverable 5 - Living Will - Https www mindtools com pages article leadership style quiz htm - 11.2.4 configure a ppp wan link - Differentiation of inverse trig - Smyths glasgow fort website - Ethics and leadership - How to fill out ati remediation template basic concept - Aqf level 7 bachelor - As you like it poem - Tuesdays with morrie the curriculum - Kyra is using rectangular tiles - Mark welch vascular surgeon - Laboratory 5 mitosis and meiosis - French imperialism in indochina - Develop and maintain networks and collaborative partnerships - ACC556 Week 1 - Head cook at weddings and funerals - Anglo german naval agreement - Gundy company expects to produce - Try as he might the sideshow barker - Future value sinking fund calculator - 005 super why the tortoise and the hare - Conventions of prose fiction - Kate tempest people's faces meaning - Innovation, Entrepreneurship And Technology Transfer - Mental model - Contact lens instruction sheet - Financial information is presented below operating expenses 28000 - Input to output fault finding - 1 page due by 24 hour - Perpetual average cost inventory system - English - Andrew jackson indian removal act speech - CIS 348 Assignment 2: COPA and CIPA - Unsw library subject guides - Classified biology past papers igcse - Maslow's theory mcdonalds - Idiot nation michael moore summary - Dementia care mapping training - Eco 110 discussion question answer - Supervision concepts and practices of management 13th edition pdf - Border force jobs birmingham - Thesis statement and introduction paragraph - Limiting reagent balloon lab answers - Rotational inertia of disk and ring lab report - Terms and conditions may apply movie online - A multidomestic corporate level strategy is one in which - Op - Abb ref615 relay application manual pdf - Secret of evermore lobotomy chicken - Demographic factors affecting automobile industry - Chemistry article hot and cold packs answers - 5010 kj to calories - Personal statement editting