Submitted by: Jasmine Patel Group members: Elizabeth McLeod and Ashley Kozlyk Experiment #: 2 Date Conducted: Section: 4-02 Changes in Matter Objective To find out the different chemical and physical changes in a substance when in contact with another specific substance. Theoretical Background A characteristic property is a property which defines a substance Hypothesis Chalk test hypothesis A crushed piece of chalk will become a powder. Chalk and HCl hypothesis Pouring hydrochloric acid on a piece of chalk will make the chalk disintegrate. Icing sugar and iron filings hypothesis Mixing iron filings with the icing sugar will give the icing sugar a magnetic field. Icing sugar and H2SO4 Pouring concentrated sulfuric acid in a …show more content…
When it is combined with the iron filings - which have strong magnetic capabilities - it moves with the magnet alongside those filings, giving it a magnetic ability. Icing sugar and H2SO4 Icing sugar is placed into a small watch glass and is noted as a white power. When the clear H2SO4 acid is poured onto the sugar, it becomes a fizzy brown liquid that creates a heat reaction. Burning a nichrome wire A nichrome wire is a thin grey wire to begin with. When it is held into a flame, it bursts into a white wire instead of grey. An interesting remark though, is when the wire is removed from the flame, it returns to its original state of a grey wire. Burning a strip of …show more content…
When it is in contact with fire, it blasts an eye damaging white light that must only be looked at through the cobalt glass provided. When the burning is over, the strip of magnesium is reduced to white ashes. Source of error During the chalk and hydrochloric acid test, there may have been an insufficient amount of acid when it was poured into the beaker. This was not realized until the chalk was placed into the acid. There was no immediate reaction between the hydrochloric acid and the piece of chalk. This may have caused a slight disturbance during the chemical reaction preventing a perfect result. However in the end, it was clear that the chalk was disintegrating which did not cause any confusion between the results. Conclusion The objective of this lab was to recognize the chemical reactions between different elements and to analyze their properties. For example, the chemical reaction between the chalk and hydrochloric acid, the icing sugar and H2SO4 the and finally the burning magnesium strip have all been proved to be chemical reactions. Meanwhile the other experiments have had a physical change. To conclude, the hypothesis will be supported because the observations made matched with those of the
A: The reaction with water and vinegar was the most useful in this experiment. The physical properties were very self explanatory because the texture of the powders was all different expect icing sugar and cornstarch. Also the Ph levels were very similar of six and seven for corn starch and icing sugar respectively. d) Q: How confident do you feel about your identification of the
The reaction between the sugar in the gummy bear and the melted potassium chlorate in this experiment is an example of an exothermic reaction. An exothermic reaction is a chemical reaction that releases energy as heat or light. When potassium chlorate is melted, it produces potassium chloride and oxygen. When the sugar and oxygen react, energy accumulated in the chemical bonds of the sugar molecules is released. This is a combustion reaction, an exothermic process in which a substance reacts specifically with oxygen to produce heat, water, and carbon dioxide. During the process of combusting the sugar in the gummy bear with oxygen, the products formed are heat, a purple flame (light), carbon dioxide, and water.
as: a.. * Temperature * Concentration of acid * Surface area of chalk * Pressure Light intensity (this is a very small effect so it doesn't really. count and I won't take it into account). Whether a catalyst is present (in this experiment there isn't one).
Solid A was identified to be sodium chloride, solid B was identified to be sucrose, and Solid C was identified to be corn starch. Within the Information Chart – Mystery White Solid Lab there are results that distinguishes itself from the other 4 experimental results within each test. Such as: the high conductivity and high melting point of sodium chloride, and the iodine reaction of corn starch. Solid A is an ionic compound due to its high melting point and high electrical conductivity (7), within the Information Chart – Mystery White Solid Lab there is only one ionic compound which is sodium chloride, with the test results of Solid A, it can be concluded that is a sodium chloride. Solid B was identified as sucrose due to its low electrical
An elements¡¦ reaction to certain substances may be predicted by its placement on the Periodic Table of Elements. Across a period, an element on the left will react with more vigor than one on the right, of the same period. Vertically, as elements are sectioned into groups, the reaction of each element increases as you move down in the same group. With this in mind, the reactions of the substances involved in this experiment may be hypothesized, observed, and validated.
The results from the experiment show that the Law of the Conservation of Mass is correct in the two different experiments. The experiment in an open environment showed that the mass will always stay the same when vinegar and sodium hydroxide react with each other. The mass of each substance was calculated before the reaction, and after the reaction, the mass of the reaction was the same and no mass was lost. In the closed environment experiment that provided gas, the amount of gas complimented to the mass of the other substances and showed that no mass had been destroyed or created. These results prove the hypothesis as the mass of both substances were predetermined before the reaction and proved the mass stayed the same throughout the
For this experiment we have to use physical methods to separate the reaction mixture from the liquid. The physical methods that were used are filtration and evaporation. Filtration is the separation of a solid from a liquid by passing the liquid through a porous material, such as filter paper. Evaporation is when you place the residue and the damp filter paper into a drying oven to draw moisture from it by heating it and leaving only the dry solid portion behind (Lab Guide pg. 33.).
By doing this experiment, I can know the physical and chemical properties of these samples. After I get my results about the physical and chemical properties of these samples, I can compare my results with the information given by the past student and identify the 5 unknown samples, finding out which sample is which substance. Hypothesis = ==
Planning: I will use marble chips and different concentrations of hydrochloric acid and water to see how it affects the rate of reaction. I will use 30ml of liquid made up of different concentrations of acid diluted with water.
By exposing the chocolate and the cookies before the light and heat of the 60-watt light bulb, the students will be able to progressively observe the process of the material melting and make records at every stage of the experiment. Using the 15 seconds step, the students can identify the melt temperature and time of the chocolate under the lab conditions as well as make and analyze their records in the final part of the experiment. The experiment is expected to establish, which of the chocolates and cookies melt faster, and make conclusions about the influence of the consumables ingredients on their physical properties. This corresponds with the TEK 112.11 (5B) procedure, which allows students to “observe, record, and discuss how materials can be changed by heating or
How the change of Hydrochloric Acid concentration affects the rate of reaction with Marble Chips
metal situate in the same fassion also creating a magnet. Now that we know the
A ferromagnetic material is composed of many microscopic magnets known as domains. Each domain is a region of the magnet, consisting of numerous atomic dipoles, all pointing in the same direction. A strong magnetic field will align the domains of a ferromagnet, or in other words, magnetize it. Once the magnetic field is removed, the domains will remain aligned, resulting in a permanent magnet. This effect is known as hysteresis.
Introduction: A phase change is a result from the kinetic energy (heat) either decreasing or increasing to change the state of matter (i.e. water, liquid, or gas.) Thus saying, freezing is the phase change from a liquid to a solid which results from less kinetic energy/heat. Also, melting is the phase change from a solid to a liquid which results from adding kinetic energy/heat. So, the freezing and melting point of something is the temperature at which these phase changes occur. Therefore, a phase change will occur when a vial of 10 mL of water is placed into a cup of crushed ice mixed with four spoonfuls with 5 mL of sodium chloride for 30 minutes. If 10 mL of water is placed in an ice bath, it will then freeze at 5 degrees Celsius because the kinetic energy will leave quicker with the ice involved. The purpose of this lab is to observe what temperature the water must be to undergo a phase change.
One can create an electromagnet by running an electric current through a wire which in turn will create a magnetic field. An electromagnet may only be a temporary magnet but it has the same magnetic properties as a permanent magnet. Any magnet creates a magnetic field and this magnetic field will contain two ends or polls, one North and one South. The fundamental law of magnets states that ?Opposites attract and likes repel? and the same holds true with an electromagnet. A simple electromagnet can be created by the use of a power source and a piece of wire as shown in Figure 1. The magnetic field created will be stronger then the magnetic field of the earth, effecting the compass and will cause the needle to move in the direction of this newly created magnetic field.