We use cookies to give you the best experience possible. By continuing we’ll assume you’re on board with our cookie policy

The Thermal Decompasition Of Copper Carbonate Essay Sample

essay
  • Pages: 4
  • Word count: 1,048
  • Rewriting Possibility: 99% (excellent)
  • Category: carbon

Get Full Essay

Get access to this section to get all help you need with your essay and educational issues.

Get Access

Introduction of TOPIC

Copper has two oxides, Cu2O and CuO. Copper carbonate, CuCO3,

decomposes on heating to form one of these oxides and an equation can

be written for each possible reaction.

Equation 1: 2CuCO3 (s) > Cu2O (s) + 2CO2 (g) + 1/2O2 (g)

Equation 2: CuCO3 (s) > CuO (s) + CO2 (g)

Apparatus

1) Scales capable of weighing out 0.01g

2) An 100cm3 gas syringe with bung

3) A Test Tube

4) Bunsen burner

5) Heatproof mat

6) 0.411g Copper Carbonate

7) Safety goggles

8) Clamp and clamp stand

9) Gas syringe holder

10) Weigh boat

Background

* Cu2O is also know as known as cuprous oxide.

* It is insoluble in water and organic substances.

* It is found as the mineral cuprite in some red-coloured rocks.

* When it is exposed to oxygen, copper will naturally oxidize to cuprous oxide, but this takes a lot of time for it to happen.

* It usually turns a bright red when heated, this is something to look for in the experiment, if we see a bright red colour we know it is Cu2O.

This is what Cuprous Oxide looks like.

* CuO is also known as Cupric oxide.

* It is found in the mineral tenorite.

* It is a black solid which melts above 1200 �C.

* It can be formed by heating copper in air.

* It stays black when heated, this is different to Cuprous oxide so we could tell which is which oxide.

This is what cupric Oxide looks like.

Calculations

* Firstly I decided to work out the volume of Cu2O+2CO2 + 1/2O2, this is because I worked out that out of the equations this would be the one with the most gas given off.

* I found that the ratio of 2CuCO3 > Cu2O + 2CO2 + O2 = 2:21/2, this can be rounded down to 1:11/4,<

/p> * To work out the volume of gas given off in Cu2O+2CO2 + 1/2O2 I

will do 24 x 1.25 which makes 30,

* I got the 24 as that is the volume in dm3 of one mole of gas.

* Now I need to work out the weight of CuCO3 I will need in the experiment so the gas syringe wont overflow so firstly I will then convert 30dm3 into 30000 cm3 to make it an easier sum overall.

* I will then divide by 100 as this the volume of the gas syringe, this makes 300 cm3.

* Then I will finally work out mass by dividing the molar mass of CuCO3 which is 123.5, with the 300cm33

* This then works out to be 0.41166666767g of CuCo3.

Method

Firstly weigh the CuCO3 carefully by weighing out 0.411g of the substance, taking into account the weight of the weigh boat and then after the weighed substance has been placed in the conical flask, weigh the boat again to make sure that no substance has been left over. Carry this process on if needed until 0.411g of CuCO3 is reached.

Place the weighed mass of CuCO3 into the test tube and insert the bung to make sure that no gas can escape put the gas syringe on a clamp and in a gas syringe holder and keep horizontal to make sure there is no advantage of gravity. Attach the test tube to the clamp. Light the Bunsen burner and place it on the heatproof mat, underneath the test tube.

Heat until the copper carbonate has entirely decomposed. This will

be indicated by the fact that the gas syringe will stop moving and the powder has gone either black or red.

Take the reading from the gas syringe and note down the volume of gas produced.

Repeat these stages a further 2 times, then take an average of the 3 results.

In this experiment it is imperative that the test is kept fair, this can be done in many ways. Firstly by making sure that the weighing of the CuCO3 is correct, This is important as if there is more than expected the gas syringe can read a lot higher and could be given the impression of being the other oxide. Secondly I can make sure that the bung on the test tube is pushed on tight so no gas is lost and the experiment isn’t incorrect by it. I also need to take into account that my glassware and equipment does have a percentage of error, although this should not affect my experiment too much as it will be quite clear which oxide it will be with the colour and the obvious difference in volume of gas given off.

In my experiment I will also need to think of safety as it is a key factor to keep myself safe and clear of dangers. I will need to be aware of the Bunsen burner and Bunsen burners, I will help with this by clearing the area and standing at all times. Also with a great deal of heat being applied to the test tubes they can shatter so I must wear goggles just encase they do and go in my eye.

Sorry, but full essay samples are available only for registered users

Choose a Membership Plan

We can write a custom essay on

The Thermal Decompasition Of Copper Carbonate Essa ...

According to Your Specific Requirements.

Order an essay

You May Also Find These Documents Helpful

Investigation Of Factors That Affect Carbon Dioxide...

Research Questions: 1. What is the optimal temperature for yeast to metabolize sugars? 2. What is the sugar that is most readily metabolized by yeast? Are there any sugars that yeast cannot metabolize? 3. What is the optimal concentration of sugar (in 60 mL of water) for yeast? Results: The amount of carbon dioxide (CO2) produced by yeast in various conditions (independent variables: temperature, sugar type, and sucrose concentration) was recorded and is shown in the table below. The table also contains the processed data of the average amount of CO2 produced by yeast under different conditions and the standard deviations for those sets of data. * Data Point is not included in the calculation of the Mean and Standard Deviation. (See Evaluation for detail) 1. Processed Data (Mean and Standard Deviation) are highlighted in purple. 2. Some data points were recorded only to the first decimal place (color-coded in...

Which 6 Carbon Sugar Would be Most...

Introduction Many yeasts are anaerobic organisms or can survive in oxygen - absent environments during which time they ''switch'' to a process called anaerobic respiration for the purpose of producing food by breaking down carbohydrates. The final products of the anaerobic respiration are nutrients, ethanol and carbon - dioxyde. Whats more, different types of carbohydrates release various amounts of energy during fermentation. The amount of CO2 released is directly proportionate to the quantity of energy gained by the process. Research question Which 6 - carbon sugar would be most suitable for yeast fermentation by energy - efficiency? Hypothesis In our opinion, glucose posesses the highest energy potential, due to its structure and the locations of its OH groups. Dependent CO2 released Controlled Independent Types of sugars used Fixed Temperature of bath water Concentration of sugars Quantity and type of yeast Table of variables Materials * yeast suspension * 2% of...

The Impact of External Factors: Water and...

1. Research question Due to the fact that most plants have no appropriate apparatus to ingest and digest food, they have to obtain it by themselves using simple ingredients. That is why plants are called autotrophs or simply "self - feeders". The process of converting carbon dioxide taken from air and water from the soil into complex substances like glucose, is called photosynthesis and can be presented by the equation: 6CO2 + 12H2O ? C6H12O6 + 6O2 + 6 H2O carbon dioxide + water ? glucose + oxygen + water Oxygen, as a waste product, is released to the atmosphere. Photosynthesis demands also a free energy taken from the sunlight that falls on the plant. After that, chlorophyll which is a green chemical substance contained in chloroplasts, in green parts of the plant, enables to trap it and use in the further process. Those organelles are filled with a matrix,...

Popular Essays

logo

Emma Taylor

online

Hi there!
Would you like to get such a paper?
How about getting a customized one?