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Note: when you create a new publication type, the articles module will automatically use the templates user-display-[publicationtype].xd and user-summary-[publicationtype].xd. If those templates do not exist when you try to preview or display a new article, you'll get this warning :-)
Thermal effects accompanying dissolution
Camelia Trufasu
January 01, 1970 2:00:00 AM
Students are asked to carry out an experiment in order to observe if the temperature of the water increases, decreases or remains constant when into water are inserted potassium permanganate, sulphuric acid or ammonium nitrate.
Note: when you create a new publication type, the articles module will automatically use the templates user-display-[publicationtype].xd and user-summary-[publicationtype].xd. If those templates do not exist when you try to preview or display a new article, you'll get this warning :-)
Factors that favor the dissolution of a solid in water
Camelia Trufasu
January 01, 1970 2:00:00 AM
In order to observe the factors that favor the dissolution of a solid into water, students are asked to carry out an experiment in which they are asked to dissolve grains of copper sulphate and dust copper sulphate into water, then to dissolve cobalt chloride into water at a temperature of 20° and at a temperature of 80° and finally to dissolve sodium carbonate into water in two crystallizer tanks.
Note: when you create a new publication type, the articles module will automatically use the templates user-display-[publicationtype].xd and user-summary-[publicationtype].xd. If those templates do not exist when you try to preview or display a new article, you'll get this warning :-)
Importance of plants for life
Camelia Trufasu
January 01, 1970 2:00:00 AM
Plants are true "live chemical factories", which generate oxygen. In order to prove that the plants consume the carbon dioxide in the cylinder and that their leaves generate oxygen, students are asked to carry out an experiment, following the instructions on the screen.
Note: when you create a new publication type, the articles module will automatically use the templates user-display-[publicationtype].xd and user-summary-[publicationtype].xd. If those templates do not exist when you try to preview or display a new article, you'll get this warning :-)
Methods for corrosion prevention
Camelia Trufasu
January 01, 1970 2:00:00 AM
Students are asked to carry out an experiment in order to prove which are the oxygen proof metals, and how can corrosion be prevented in the case of oxygen non-proof metals.
Note: when you create a new publication type, the articles module will automatically use the templates user-display-[publicationtype].xd and user-summary-[publicationtype].xd. If those templates do not exist when you try to preview or display a new article, you'll get this warning :-)
Corrosion
Camelia Trufasu
January 01, 1970 2:00:00 AM
In this moment, students are asked to carry out an experiment that proves the chemical phenomenon of rusting for bodies made up of iron. In the end, students will have to write down the results of the experiment.
Note: when you create a new publication type, the articles module will automatically use the templates user-display-[publicationtype].xd and user-summary-[publicationtype].xd. If those templates do not exist when you try to preview or display a new article, you'll get this warning :-)
Transformations of substances by changing of composition
Camelia Trufasu
January 01, 1970 2:00:00 AM
Students are asked to carry out a number of experiments in order to prove that the burning of substances takes place with a change of their composition and with their transformation into new substances.
Note: when you create a new publication type, the articles module will automatically use the templates user-display-[publicationtype].xd and user-summary-[publicationtype].xd. If those templates do not exist when you try to preview or display a new article, you'll get this warning :-)
Purify substances by sublimation
Camelia Trufasu
January 01, 1970 2:00:00 AM
Students are asked to perform an experiment in order to learn more about the sublimation phenomenon. The substances used are Naphthalene and the benzoic acid (a food preservative) that have the property of sublimating.
Note: when you create a new publication type, the articles module will automatically use the templates user-display-[publicationtype].xd and user-summary-[publicationtype].xd. If those templates do not exist when you try to preview or display a new article, you'll get this warning :-)
Purifying substances by distillation
Camelia Trufasu
January 01, 1970 2:00:00 AM
Students learn that substances can be purified by distillation (physical method). They are asked to perform a practical experiment of the theoretical notions by distilling a mixture of water and alcohol.
Note: when you create a new publication type, the articles module will automatically use the templates user-display-[publicationtype].xd and user-summary-[publicationtype].xd. If those templates do not exist when you try to preview or display a new article, you'll get this warning :-)
Pure substances and impure substances
Camelia Trufasu
January 01, 1970 2:00:00 AM
Students learns, using a practical exercise, that substances can be pure or impure. They are asked to dissolve two pieces of sugar, one pure and one impure with coal dust. After the dissolution of the impure piece of sugar, students notice the residue left on the bottom of the beaker.
Note: when you create a new publication type, the articles module will automatically use the templates user-display-[publicationtype].xd and user-summary-[publicationtype].xd. If those templates do not exist when you try to preview or display a new article, you'll get this warning :-)
Separation of substances in a solid-liquid mixture by filtering
Camelia Trufasu
January 01, 1970 2:00:00 AM
Students learn how to create a filtering installation and also how to make an adequate filter using a square paper. They will be asked to filter a mixed solution using the installation created earlier.