Mass Conservation Essay

1526 words - 6 pages

The conservation of massAIMThe aim of this experiment is to show that mass is conserved during a chemical reaction.The Law of Conservation of Mass, established in 1789 by French Chemist Antoine Lavoisier, states that mass is neither created nor destroyed in any ordinary chemical reaction. Or more simply, the mass of products by a chemical reaction is always equal to the mass of the reactants.The reaction between potassium iodide and lead (II) nitrate under room temperature and atmospheric pressure results with a yellow precipitate. This reaction can be expressed by the equation: 2KI(aq) + Pb(NO3)2(aq) ( PbI2(s) + 2KNO3(aq)HYPOTHESISThe mass before and after a chemical reaction will be the same as mass is conserved.INDEPENDENT VARIABLE:The mass before the reaction(By measuring the mass of the reactants before reaction this independent variable can be controlled)DEPENDENT VARIABLE:The mass after the reaction(By controlling the independent variable this dependent variable can be controlled)CONTROLLED VARIABLES:
VARIABLE

Digital balance

Proportion of chemicals

Beakers

Reaction time

MATERIALS
NAME

SIZE/CONC.

AMOUNT

PRECISION

Beaker

100 mL

2

Irrelevant

Measuring cylinder

25.0 mL

2

Irrelevant

Access to a digital balance

-----------

1

±0.001g

Potassium iodide solution

0.5 mol/dm3

100 mL

Irrelevant

Lead (II) nitrate solution

0.5 mol/dm3

100 mL

Irrelevant

Glass rod

20 cm

1

Irrelevant

METHODWear safety glasses, apron and covered shoes before setting up any equipment.Measure out 20 mL of potassium iodide with a measuring cylinder and pour into a 100 mL beaker.Measure out 20 mL of lead nitrate with another measuring cylinder and pour into another 100 mL beaker.Zero the balance and put both beakers together on the balance (balance is big enough for two beakers). Weigh their total mass accurately.Record the mass obtained including uncertainties.Carefully pour the lead (II) nitrate solution into the 100 mL beaker containing the potassium iodide.Record the observation during the reaction.Use a glass rod to carefully stir the mixture in order to make sure the reaction is completed. Re-zero the balance. Place both beakers back on balance and weigh their total mass.Record the mass obtained including uncertainties.When finished, pour the contents of the beakers into the laboratory sink.Rinse the beakers and the measuring cylinders under tap water.Dry the beakers and the measuring cylinders.Repeat steps 2-12 another four times to maintain accurate results.Result
Trials

Mass before weighing(±0.001g)

Weight after weighing(±0.001g)

1

138.805g

138.785g

2

139.007g

138.997g

3

138.794g

138.776g

4

138.638g

138.609g

5

138.798g

138.770g

Qualitative data:Yellow precipitate was produced.There were some spillages of the product.Processed data
Trials

Mass difference ± 0.002g

Mass difference express as percentage

Random Error

1

0.020

0.014%

...

Find Another Essay On mass conservation

The importance of material heritage to the study of history and culture

3326 words - 13 pages . Distinguishibility: Is the New Work Distinct From the Old?The integrity of the historic material is enhanced by distinguishing the new work from the old, which may include conservation measures and/or contemporary additions. The latter should be done through the use of new additions and materials compatible in mass, scale proportion, material, detailing and colour. Care shall be taken to avoid damage to significant historic, architectural or

Chemistry: Notes I took in class on Heat and Energy

314 words - 2 pages only change forms. It cannot be destroyed or created.Ex: Solar à Electrical Nuclear à Hydraulic PowerLaw of Conservation of Mass- Matter cannot be created or destroyed. It can only change forms into other matter or energy.YOU NEVER DESTROY MATTER!!Ex: A + B à AB 40g + B à 70g B à 30gPhases of MatterEvaporation- liquid to gasCondensation- gas to liquidSublimation- solid to gasPrecipitation- gas to liquidFreezing- liquid to solidMelting- solid to liquid

An Investigation Of Piaget’S Conservation Study

1291 words - 6 pages developmental task is the conservation task, examining a child's ability to "identify that certain physical characteristics of objects remain constant despite their outward appearance changes" (Berk, 2009). Dimensions of conservation include number, mass, liquid and weight. I will be examining the descriptors of Piaget's preoperational stage through the conservation of number task. At the preoperational stage (2-7 years old), Piaget proposes that

John Mundaion Johson Dalton

817 words - 4 pages same proportion by mass. (Chang, 1998) For example, if we obtain water (H2 O (l)) and analyse the samples we would find that there would be the same ration by mass of Oxygen and Hydrogen. Therefore, if the mass of a given element in a compound is fixed, than the ratio of atoms of the elements in the compounds must be constant. In 1789, Antoine Lavoisier came forward with the Law of Conservation Mass, which proposes that in the duration of a

Neutron Star

943 words - 4 pages new parameter, the pressure of the neutrons, which can be approximated by Where is the number density of neutrons and is the mass of the neutron. If the neutrons pressure is not enough to stop the gravitational energy the star will turn into a black hole, otherwise, a neutron star will be born. As massive stars shrink into neutron star ( ) conservation of angular momentum causes the star to rotate (640 Rotation/s), moreover, conservation

Conservation of Momentum

1225 words - 5 pages Penryn College Mechanics Conservation of Momentum AKANI MABASO 5/19/2014   Contents Investigative Question: 1 Aim: 1 Hypothesis: 2 Apparatus: 2 Method: 2 Variables: 3 Results: 3 Discussion: 7 Conclusion: 9 Bibliography 9 Declaration of Authenticity 10 Investigative Question: During a collision between two objects, is the amount of momentum present in a system before the collision different to the amount of momentum present afterward or

Key environmental legislation

1302 words - 5 pages Key Environmental LegislationThere are many aspects of the environment that federal agencies take into consideration while they keep key aspects in tighter focus. Key areas include air quality, energy, land use and conservation, noise control, pesticides, solid waste management, toxic substances, water quality, wildlife conservation and other general environmental legislation. In this paper our findings reveal that some key areas are even more

Buddhist Monuments In The Horyu-Ji Area Year 11 Ancient History Assessment Task III World Heritage Site Study

1459 words - 6 pages been installed as well as private fire bridges to aid firefighters. With the tourists it is only a small conservation issue. Yet the wood, being old is not quite sturdy enough to allow mass amounts of tourists on a regular basis so a usage plan has been created for the Buddhist monuments, which adequately conserves the site but also allows the eager tourists to have enough access to explore the Horyu-Ji site. The tourists are not really that much of

Are we on the cusp of the sixth mass extinction event?

818 words - 4 pages .; Lindsey, E. L.; Maguire, K. C; Mersey, B.; Ferrer, E. A.. (2011), Has the Earth’s sixth mass extinction already arrived? , Nature, [online], Vol 471: 51-57 Feulner, G. (2009), Climate Modelling of Mass-Extinction Events: Review, Int. J. Astrobiology, 8 :207-212. Jenkins, M. (2003), Prospect for Biodiversity, Science, 302: 1175-1177 Unknown (2003), Stage set for sixth mass extinction of animals, Science, 331: Haamble, C; Henderson. M. R (2011), Extinction rates, extinction-prone habitats, and indicator groups in Britain and at large scales, Biological Conservation, 144: 713-721

Summative Report On The Solar Cooker

1137 words - 5 pages SUMMATIVE REPORT1.0Conservation of EnergyEnergy is defined as the ability to do work. It exists in various forms and may be transformed from one type to another. However, these energy transformations are constrained by the Conservation of Energy principle. It can be interpreted as "Energy can neither be created nor destroyed, it can only be converted from one form to another" An alternative is to say that the total energy of an isolated system

Living In The Environment Principles, Connections, and Solutions : Miller 12th Edition Chapter 2 Outline

1202 words - 5 pages for its resources as quickly as possible2-3 Environmental History of US: Early Conservation Era- 1832- 1870 Henry David Thoreau- lived in cabin near Walden Pond near Concord, Mass. For 2 years and wrote Life in the Woods George Perkins Marsh- Congressmen for Vermont published Man and Nature1870- 1930 Forest Reserve Act of 1891 to protect public lands John Muir- Founder of Sierra Club. Lead of conservation movement

Similar Essays

Conservation Of Mass Lab Essay

507 words - 2 pages Abigail Gentry Lab Report Period: 7Conservation of Mass LabIntroduction:The Law of Conservation of Mass says that matter can be changed from one form to another and mixtures can be separated or made, but the total amount of mass remains the same. The purpose of this experiment is to verify the Law of Conservation of Mass using baking soda and vinegar. In any chemical reaction, the total mass of the recants is equal to the mass of the products

Conservation Of Mass Lab Essay

507 words - 2 pages Abigail Gentry Lab Report Period: 7Conservation of Mass LabIntroduction:The Law of Conservation of Mass says that matter can be changed from one form to another and mixtures can be separated or made, but the total amount of mass remains the same. The purpose of this experiment is to verify the Law of Conservation of Mass using baking soda and vinegar. In any chemical reaction, the total mass of the recants is equal to the mass of the products

Conservation Of Momentum Investigation Essay

882 words - 4 pages Conservation of Momentum Investigation Physical Science Practical   Table of Contents Investigative Question 3 Hypothesis 3 Apparatus 3 Method 3 Results: Ticker Tape Pieces 5 Calculations 8 Discussion 10 Conclusion 11 Bibliography 12 Investigative Question Does the momentum of an isolated system remain constant even after a collision and does the addition of mass on an object affect the momentum of an object? Hypothesis

"How Should We Decide Which Species To Prioritise For Conservation?"

875 words - 4 pages fulfils the aim of preserving a high level of biodiversity for the future but it doesn’t combat the existing problems which species are encountering. A tangential approach to choosing a triage system for organisms is habitat based conservation. This involves choosing specific areas to restore as this sixth mass extinction is largely due to human impacts. Out of Jared Diamond’s “evil quartet,” three causes of extinction are due to land destruction