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

Copper nitrate and sodium hydroxide

11/11/2021 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:

Coursework Help Online
Quality Homework Helper
Chartered Accountant
Premium Solutions
Smart Tutor
Homework Master
Writer Writer Name Offer Chat
Coursework Help Online

ONLINE

Coursework Help Online

I have read your project details and I can provide you QUALITY WORK within your given timeline and budget.

$22 Chat With Writer
Quality Homework Helper

ONLINE

Quality Homework Helper

I have assisted scholars, business persons, startups, entrepreneurs, marketers, managers etc in their, pitches, presentations, market research, business plans etc.

$43 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.

$28 Chat With Writer
Premium Solutions

ONLINE

Premium Solutions

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

$47 Chat With Writer
Smart Tutor

ONLINE

Smart Tutor

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.

$34 Chat With Writer
Homework Master

ONLINE

Homework Master

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.

$47 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

Application of electrochemistry in health - World War 2 - Example of argumentative essay about education - Apple iphone not made in america case study - Is wd 40 liquid flammable - Discuss ways organizations have built a csirt - Round 0.123 to the nearest hundredth - Disney worldwide services inc w2 - Whatever happened to crazy eddie - Essay - What are universal gates explain - 3 page Assignment with no plagiarism in APA format | Organ leader and decision making - The Use of Clinical Systems to Improve Outcomes and Efficiencies - What is sr2 in multiple regression - Article review - Cryptic sweets and chocolate quiz - Roma mitchell secondary college toni carellas - Sfas table - HW 2 - School of thought approaches to entrepreneurship - Iso 23277 acceptance criteria - Josh turner baby lock them doors chords - Evil jireh the voice - Bhp port hedland address - Mulga bill's bicycle worksheet - Questions COPY and PASTE - Biggest challenge with apa formatting - Dante's Inferno Discussion Response - Partial statement of cash flows - Signs that read “no smoking,” “honk horn to open,” and “emergency exit only” specify - Analysis - Case problem all time movie box office data - Project Management - Interpreting weather station models lab answer key - Boba interview questions - Workshop on Hiring People with Disabilities - Computer lab equipment list - Identity governance magic quadrant - How to build wealth in your 30s - Negative Message - Which famous art form represented a fertility figure - 20 minutes in military time - Google earth faa airspace overlay - Pwm duty cycle vhdl - Discussion assignment - Week six assignment: show you care - Microsystem and macrosystem in healthcare - New Assignment ( 7 pages due by 15 hours) - Hell bunny eyeball perry dress - S4 timetable oxford to banbury - Popped secret the mysterious origin of corn answer sheet - Week 9 Discussion - Characteristics of byzantine paintings - He li be bcnof ne - Sydney water sewerage diagram - Personification in to kill a mockingbird with page numbers - Elevator Design you are designing an elevator for a hospital. The force exerted on a passenger by the floor of the elevator is not to exceed 1.60 times the passenger's weight. The elevator accelerates upward with constant acceleration for a distance of 3.0 m and then starts to slow down. What is the maximum speed of the elevator? - Intro to General Psychology - Peregrine assessment exam certificate - Vertical horizontal and oblique lines - Introducing others formal and informal - Question answer from the book - 1000 is taken out of a bank vault - Funnel shaped residual plot - Discussion 1 WK 3 SOCW 6443: The Benefits and Limitations of Antidepressant Medications - Where is petty cash on the balance sheet - Pfizer management structure - Mecklenburg county health department - How do banding patterns change when a muscle contracts - Stainless steel reo bar - Free molecular visualization software - Internet marketing and ecommerce ward hanson - Cost-Benefit Analysis for Solving Master Data Management Issues - Cirque du soleil vegas 2011 - Presentation - In the short run a pure monopolist - Elan fashion jewelry - Assignment_DataScience - Curvilinear motion examples in sport - 110 salerno street surfers paradise - Unit 8 Data Analysis and Application - Matweb aluminum 6061 t6 - Early recontract fee singtel - Gifford mcmahon refrigeration ppt - Blank training matrix template - PPT - Looking for richard documentary - Off grid solar system calculator - Stage scenery crossword clue - Dulux brunswick green colour - 3.2 m in cm - Business Intellegence - How to calculate equivalent weight of copper - What is 2 fifths of 20 - Individual health history and examination assignment resource - Week 6 Discussion Forum Pathophysiology - Draw enantiomers for the following compound using perspective formulas - Physiological psychology - Strategic Information Systems for Business and Enterprise - Cal g to kcal g