The Mystery Mixture And The Mystery Mixture

What is the appearance of reactant, Evidence of chemical reaction, and properties of a product?

We were assigned mystery powder convertible which contained calcium carbonate, baking soda, and sucrose. We found out that the mystery powder had calcium carbonate because when it reacted with iodine it turned orange/brown. When calcium carbonate reacted with vinegar it had a fizzy-like reaction. It also reacted with hydrochloric acid and that caused it to bubble. When we tested the mystery powder it also turned orange/brown when we added iodine. Also when we added vinegar and it also fizzed like the calcium carbonate. Again when we added the hydrochloric acid it reacted exactly like calcium carbonate, lots of bubbles were made. We know that the calcium carbonate was in the mystery powder because it had similar reactions.

Our objective for the Sherlock Holmes Experiment was to illustrate that some chemicals can be identified or differentiated by simple chemical tests, such as solubility, pH, or color tests. In our group we had to test come common powders such as Alka-Seltzer, baking soda, flour, Vitamin C (ascorbic acid), and salt. Other chemicals that were used to do this experiment were vinegar, and Iodine 2 Solution. The equipment used to do this experiment was red litmus paper, and 5 test tubes per group.

The primary goal of this laboratory is to correctly identify an unknown substance. To achieve this task, one may use various tests that reveal both chemical and physical properties of a substance. By comparing the results of a known substance and the unknown substance, one may eliminate alternative possibilities and more accurately predict the undisclosed compound. Furthermore, by performing these tests, data can be collected and verified regarding chemical and physical properties of the unknown. Understanding the chemical properties of a known substance aids one’s understanding of the unknown based on comparative analysis of the results of the tests.

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.

A chemical change can be caused by combining two compounds, such as baking soda (NaHCO3) and vinegar (CH3COOH). The change that is taking place is because of the chemical property of reactivity. When these two compounds react CO2 is produced. In this experiment we wanted to see how much baking soda, added to 10mL of vinegar, would cause a film canister rocket to shoot the farthest. I predicted that 10mL of baking soda would shoot the farthest because it would be equal to the amount of vinegar in the canister. The independent variable in this experiment was the amount of baking soda and the dependent variable was how far the lid would shoot.

to mix matter by mixing cornstarch and water. They will be observing and documenting any changes that occur over the first couple minutes of mixing the two substances. (Synthesis: Students were hypothesizing what they thought would happen when water and cornstarch were mixed together; following their hypotheses up with immediate observations and again after two minutes. Can you predict the outcome if cornstarch and water were mixed?)

This is proven because during the experiment there were only two substances that started bubbling in reaction to vinegar. These two substances are the baking soda and the unknown substance. Due to the reason these were the only two substances that had shared these specific chemical properties it proves that baking soda is most probable for being the mystery substance. Another reason which verified baking soda being the mystery substance is that it has the same Universal Indicator Result which is pH8. Furthermore, another factor which contributes to how baking soda is the mystery powder is that it is very powdery, soft, and white.

Introduction The objective for the “Mixed Substances” lab was to see how properties of an individual substance compare with properties of mixed substances. Before creating a hypothesis or even continuing the lab I had to research what a mixture is, what a homogeneous mixture is, and what a heterogeneous mixture is. A mixture is the combination of two or more substances that are mixed together physically; but, do not combine chemically. A homogeneous mixture is uniform in structure and composition throughout a substance.

Well, since these articles talk about an atom, it connects greatly to our class when we learned about the periodic table. We went through atoms and some of their uses just as these articles did. In a more specific sense, the second article connects to our class greatly because we recently studied ocean acidification and the effects of carbon dioxide in saltwater. We conducted a lab called, “The Bubbles Lab,” to show the change of pH on saltwater when carbon dioxide is blown in. Also, the first article shows processes of an experiment. They tested whether the box and tablet were real or not and gathered evidence to test each claim(if the box and table were real and if they were fake). We went over these processes in class early in the year and in all of our labs we have a claim and we gather

In 8th grade there were 20 scientists who was trying to figure out the mysterious mixture of chemicals. At first there were nine chemicals total. Now they have narrowed it from nine to 2. All 8th graders think it has baking soda in it. Half of the class is in disagreement with the other 1/2 . Half of the class thought it was Baking soda, and Citric Acid. The other half thought it was Baking soda and Vitamin C. The data going to be presented with help you understand why half of the class thinks it baking soda and citric acid, and why they don’t think it’s baking soda and citric acid.

Children start learning science through their observation, exploration and curiosity as toddlers, much earlier before they hear the word ‘science’ uttered by an adult. Later, they gain a better insight about science by involving into play activities, learning the hidden concepts through an adult’s guidance and scaffolding. So, science is an integrated part of the Australian curriculum that runs from the foundations year to the school final. It is imperative for the educators to plan science experiments for children, that will be an enjoyable experience for the children, embracing learning experience aligned with curriculum appropriate for the age. The following case study would throw light on a child’s experience

Medicine is scientifically similar to this. I love science experiments because the are also similar with adding in recording the results. When making slime you have to measure the amount of borax for it to be perfect. Too little borax and it will look like snot; too much will make it look like a hard booger.

In this field, professionals would determine what is true or worth knowing by means of empiricism, which is knowledge through direct sensory experiences. These senses include sight, smell, taste, touch, and sound. Chemistry uses those senses to understand different processes, such as breathing, digesting, etc. Such processes and many more interpretations will help understand and explain our world a little better. Knowledge comes from our observations and perceptions. Similar to what Aristotle has believed, we must look around us to understand. We must observe, record, analyze, and repeat. Evidence is the key in this field. During labs, collecting and recording data is so important. This would allow one to have a set of data points that may or may not show a relationship to whatever one is studying. Equations are made and used to better understand the data that was received and is reported. Repetition and patterns will then verify our accuracy and precision of our data. Protocols are made so that experiments can be repeated. This all relates to play a role within the scientific method as well. The scientific method is a

Chemistry is very important, it is basically anything that deals with matter. If you think about it almost everything around us is matter. Matter is anything that takes up space. Matter is composed of both chemical and physical properties. A chemical property is determined by the substance's ability to react with other substances. Chemical properties react to air, rust, tarnish, rot, burning, and etc. According to Modern Chemistry, a chemical change is a change that occurs that causes the identity of a substance to change; something new is formed. A chemical change is irreversible, meaning that it can’t change back to it’s original state. According to Modern Chemistry, a physical property is description of an object / substance. A physical change is a change that occurs without changing the identity of the substance, no new substances are formed. We can determine a physical change by using our 5 senses and a physical change is always reversible. Did you know that viscosity, friction, and density are all examples of a physical property.