Separate Materials Lab

Every individual is different in a specific way. Like people, substances have unique qualities, such as properties, which aid chemists to differentiate and identify the particular components the substances consists of. These particular qualities are identified as either physical or chemical properties. Physical properties are properties which do not require a chemical change of its composition in order for the substance to be classified. A few examples of physical properties include color, density, odor, boiling point, melting

6-3: This process is used by cells to manufacture _biochemical energy from nutrients into adenosine triphosphate (ATP), and then release waste products__

The experiment procedure is first, get your materials, shells, water, vinegar, measuring spoon, a cup, and a beaker. Next,

In the last test, we had to test out a mystery powder (powder A, B, C), in its own separate test tube, in order to solve the Sherlock Holmes Mystery. Our group had powder C. When we mixed water in the mystery powder, it did not dissolve. When the litmus paper was put into the test tube it turned blue. When the vinegar was mixed it bubbled/foamed up. When we mixed the iodine solution, there was no reaction and the solution turned to a dark brown/black color. When we mixed in the baking soda there was no reaction and it turned to an even darker color.

The composition of a pure substance is constant, and thus pure substances have characteristic physical properties that do not change and this is why we are able to separate each element in this lab experiment. Examples of physical properties that can be used to describe pure substances include solubility, conductivity, magnetism, density, boiling point, and melting point.

The objective of this experiment will be to combine various substances, liquids and metals, and to observe their behavior when they are combined. The types of reactions observed shall determine the nature of these reactions: physical or chemical.

Abstract: We conducted several experiments using the Scientific Method. We made observations, recorded them and used our observations to propose a hypothesis. The experiments included chemical and physical reactions dealing with torn news paper, appearance of rock salt crystals, the appearance of sand, oil and water on plastic, and making iodine in water and mineral oil. We found that all these included four physical changes and two chemical changes. This was important in determining the substance or mixture that dealt with physical and chemical properties as well as homogeneous and heterogeneous mixtures.

Hypothesis: If we use these materials and use magnets, water, burners, and filters on the mixtures and elements given we should determine what kind of effect these materials given will have on these mixtures and elements, physical or chemical.

Weigh the large block on an electronic balance and write the mass on the data table. Record the masses of the metal blocks in grams and maintain the certainty of either the milligram or analytical balance. When you are finished recording show your data to your instructor for their initials.

A physical change is when you can change it back without a reaction. A chemical change is when you need to make a reaction to separate them. In experiment 1 it was a physical change because the sulfur and iron filings were just a heterogenous mixture. In experiment 2 it was a physical change because when we poured the liquid in the the warm water we just cooled it off into a solid so it didn’t have a chemical change. In experiment 3 it was a chemical change because it had a temperature change and a gas exchange happened. In experiment 4 it was a chemical change because it had temperature change and gas exchange. In experiment 5 it was a chemical change because it formed a precipitate and it changed color to white. In experiment 6 it was physical change because it was salt water which can be

After reading the lab you have to organize the data you are looking for and the data you have already been given. For example, we already know the solutions involved in the experiment; 0.8 M, 0.6 M, 0.4 M, and 0.2 M of sucrose. Sucrose is commonly known as table sugar and has the ability to dissolve in water. What we are looking for is which solution belongs in which flask; flask A, flask B, flask C, and flask D. Before developing an experiment it would be smart to do research on the topic; Diffusion is the process that moves particles from a higher concentration to a lower one and Osmosis is the diffusion of water that occurs across a semipermeable membrane; a polymeric membrane that allows specific things to pass through by diffusion.

In this experiment, each substance in the mixture has a physical property different from the others which allows it to be removed. The first substance separated was iron. Iron

  To understand mechanisms of the fracture of brittle materials (in this case, glass) To recognize the variations in deformation and failure mechanisms which occur with a difference in flaw size, (i.e. between scratched and unscratched samples) Defining flaw sizes in glass plates by employing linear elastic fracture mechanics (LEFM) Utilizing the Weibull statistics approach in predicting probable failure in brittle materials.

Lead Oxide + Sulfuric Acid + Hydrogen + 2 electrons → Lead Sulfate + Water

Methods: There are ten experiments are perform in lab number from 2 to 11. (number 1 is omitted). Number 2: Using the dropper, place 2-3 drops of water on the glass slide labeled “water”. Lay the second glass slide over the first glass slide. Try to pull them apart without sliding the glass. Record the observations. Repeat