Archive for the ‘Camosun Reports’ Category

Report – CHEM120 – Determination of Water Hardness using EDTA

CHEMESTRY 120-02                                                   2009-11-17
DETERMINATION OF WATER HARDNESS USING E.D.T.A.

Stefan Martensson C0347318
Lab Partner: Danielle

Procedure: Please refer to handout ‘Experiment #7’ and page 35-38, Chemistry 120 Lab Manual, 2009 Edition, Camosun College. Plus additional handout: Report and Calculation Guide.

Theory:
Hard water is water that has high mineral content (mainly calcium and magnesium ions). Hard water minerals primarily consist of calcium (Ca2+), and magnesium (Mg2+) cations, and sometimes other dissolved compounds such as bicarbonates and sulfates. Calcium usually enters the water as either calcium carbonate (CaCO3), in the form of limestone and chalk, or calcium sulfate (CaSO4), in the form of other mineral deposits. Hardness in water can cause water to form scales and a resistance to soap. It can also be defined as water that doesn’t produce lather with soap solutions, but produces white precipitate (scum) (Wikipedia, 2009). Read the rest of this entry »

Report – ENVR210 – Midterm

Q1. a) (I) Define, then (II) describe how density (sigma-t) in seawater is used to determine water structure and (III) what factors (processes) increase/decrease sigma-t. [5 mks] Read the rest of this entry »

Report – ENVR206B – Alternative Use – Another Glimps from Sweden

BIOWASTE – ALTERNATIVE USE ANOTHER GLIMPS FROM SWEDEN

Stefan Martensson C0347318                                                              2009-11-03

Background Info:
I have grown to understand that Sweden is in the forefront of the environmental research and its implementation in the real world.

My home town, Helsingborg, was awarded ‘The Most Environmental Municipality in Sweden” this year (out of 290 municipalities). Some of the reasons to the award were: Read the rest of this entry »

Report – ENVR206B – District Heating

SWEDEN – Independent from coal and oil in heating its buildings.

What is District Heating? District heating – as the name implies comes from a central plant which can use advanced methods to run on many different fuels to heat household, schools, industries and other premises. (http://www.svenskfjarrvarme.se). Read the rest of this entry »

Report – CHEM120 – Colorimetric Determination of Iron in a Vitamin Tablet using 1,10-Phenanthroline.

CHEMISTRY 120-02                                                                               2009-10-19
Colorimetric Determination of Iron in a
Vitamin Tablet using 1,10-Phenanthroline.

Stefan Martensson C0347318

Partner: Christine Meyer

Theory: To be able to measure the quantity of iron in the tablet we need to firstly assure that all the iron in the solution is in the of Fe2+ and not in Fe3+ due to the ‘blindness’ of this experiment for that ion. This is accomplished by adding Hydroquinone as a reducing agent to ensure that all iron in the solution will be in form of Fe2+.

Furthermore, to be able to view the absorption of the iron we need to enhance its very faint green colour with 1,10-Phenanthroline so it is easier to measure. Unfortunately, 1,10-Phenanthroline is only stable in the pH range of 2 to 9, and to make it stable we need to use Sodium citrate to create a buffered solution with a pH of around 3.5. Read the rest of this entry »

Report – CHEM120 – Stoichiometry of Chemical Reactions

Stefan Martensson C0347318

Procedure: Please refer to handout ‘Experiment #3’ and page 10-16, Chemistry 120 Lab Manual, 2009 Edition, Camosun College.

Theory: The Law of Constant Composition states that ‘the proportions of the elements in a compound are always the same, no matter how the compound is made’.

E.g. The reaction between heated copper and sulphur making copper sulphide (Cu2S).

Where we discovered by letting a copper thread be extensively heated with abundance of sulphur in a crucible until all sulphur had either fully reacted with the copper or burned off as sulphur dioxide.

The copper was then weighed and mass was recorded. More sulphur was added to the crucible and copper thread and was yet again set to heat up. This so the next measurement would indicate if a full reaction had occurred (about the same mass as the measurement after the first heating). Read the rest of this entry »

Report – ENVR206B – History Assignment

HISTORY ASSIGNMENT

Part 1 – 1830 – Proteins were discovered.

Proteins were first named and described by the Swedish chemist Jöns Jakob Berzelius in 1838 (Britannica 2009).

To most people, the question of where life comes from has been formed more than once.  All living organisms from microbes to humans share two kinds of biomolecules; nucleic acids and proteins (Hickman, et al. 1997). The discovery of proteins and how it is so simply built, by only four or five different elements (C, H, O, N and usually S), yet with 20 different known building blocks, called amino acids, the complexity it can create is vast (Knox, et al. 1999). Read the rest of this entry »

Report – CHEM120 – Densities of Solids and Liquids

CHEMESTRY 120-02                                                   2009-09-15
DENSITIES OF SOLIDS AND LIQUIDS

Stefan Martensson C0347318

Procedure: Please refer to handout ‘Experiment #2’ and page 6-8, Chemistry 120 Lab Manual, 2009 Edition, Camosun College. Read the rest of this entry »

Report – ENVR110 – Assignment 1 – How Green is Camosun – Part 2

ENVR110                                                Camosun College                                             2009-09-12

Assignment 1 – How Green is Camosun – Part 2

Stefan Martensson

Abstract:

The ENVR110 class were given the assignment of listing ‘green’, sustainable and environmentally friendly practices, processes and commitments for Camosun College campus. The first part of brainstorming together brought up a long list of ideas that later were compared with practices that in fact already been implemented and in addition comment on two ideas not yet implemented. Read the rest of this entry »