Do All Liquids Freeze

In Part 1 of the lab, a solar cell was created and tested for its capability to conduct electricity. After researching the processes that contribute to the conductive property, it was found that the oxidized substance is the dye, as it donates an excited electron to the titanium oxide. Consequently, titanium oxide is reduced before it donates an electron to the cathode. The electrolyte solution was found to replenish the dye with electrons so it could continue to act as a reducing agent.

Moreover, the demonstration in the article “Energy Story” was, the example shown in the article of what an atom is made up of was very detailed it showed electrons spinning around the nucleus, of atoms, in the same way the moon spins around the earth. Furthermore, the demonstration in “Conducting Solutions” the experiment that the article wrote was astonishing. The articles experiment contained water and salt and it explained how when a table of salt in water would dissolve only because the solution conducts very well because the solution contains ions and the ions come from the table of salt. Nevertheless, the clip ““Hands-On Science with Squishy Circuits” experiment that was shown was she was showing with homemade playdough created an example on how to create a circuit through play dough. Ms. Thomas was also talking about how if you put two pieces of sugar dough it has one hundred and fifty times more resistance than the salt dough she used. If you put a piece of salt dough in the middle than that’s when the led would work because to resistance substances won’t make it work but the one that has less resistance

The first part of the lab began by one lab member adding 10.0 mL of DI water to a test tube while another lab member obtained a beaker full of ice and salt. After both these steps were complete the test tube was put in the beaker full of ice. Immediately following the test tube be being placed in the beaker, a temperature probe was inserted into the test tube. The initial temperature was recorded and after the temperature was recorded in 30 second increments. Once the water exhibited supercooling and then remained consistent at .1 °C for 3 readings it was determined that the water had froze and formed crystals. Evidence that crystals formed allowed for it to be confirmed that the water actually hit freezing point at .0

Corresponding to the previous experiment, this week’s experiment measures the participants’ ability to conduct basic, fundamental laboratory procedures. These procedures revolve around scientific measurements of volume, mass, and density. Unlike last week’s activity, this week’s experiment had a few modifications. In addition to distilled water, saltwater and an unknown substance were added. There was a total of five substances to choose from; Hexane, Methanol, Ethyl acetate, Ethylene glycol, and Dichloromethane. Part C, the unknown liquid number was four, which the average density was 0.789 gmL-1, and from looking at the chart the unknown identity was methanol. Part A, the temperature of the water was 20 oC, which was in front of the class,

2) When water freezes there are additional hydrogens bonds formed between molecules and those molecules become slow.

In this video it shows you how you can use the things that are something your children play with and are commonly bought things to create your own electricity. The lady in the video was using two types of playdough’s that she has made on her own. She made a salt dough, and also a dough including sugar rather than salt. When you put the two salt pieces’ together and a sugary piece in between, you can create electricity. The purpose of this video is to tell everyone about how you can conduct your own electricity and to explain how it can be used more simply than you think. It is not all about atoms and all of those substances. You can create electricity with what you have in your own house. She tested the playdough’s by putting an LED light in the salty pieces on the outside. If they touch the light will go out, but if you place a piece of sugary dough in between the two, you can leave the light on and it will stay on.

Dry ice is a solid form of carbon dioxide that produces a cold dense mist. I first learned what Dry Ice was in fifth grade, this was due to the fact that my class had taken a field trip to River Legacy Park. Where we saw an experiment and learned facts about dry ice. This led to a fascination with dry ice, in this experiment I will test whether the temperature of water and soda affect when poured over Dry ice. Dry Ice has multiple purposes some of which, is chemotherapy, to carbonate liquids, store food, and accelerate plant growth. Since, I always liked the thought of working with Dry Ice I had begun to think of an experiment to do for the IA involving Dry Ice. After much consideration I choose to test how soda and water would

In paragraph two, it states "Pure water contains very few ions, so it does not conduct electricity well. When table salt is dissolved in water, the solution conducts very well, because the solutions contain ions.". In paragraph four, it explains how laundry ammonia can conduct electricity. It states "When ammonia dissolves in water, it reacts with the water and forms a few ions.". In conclusion, paragraph five explains more about how ammonia can cause electricity when it is put into a solution with vinegar.

Maria’s hypothesis for this experiment is that the cold water will freeze faster, she thinks this is correct because the hot water molecules move faster than the cold water molecules, causing the hot water to take longer to freeze.

Purpose: The purpose of this laboratory was to gain an understanding of the differences between the freezing points of pure solvent to that of a solvent in a solution with a nonvolatile solute, and to compare the two.

In the last article "Conducting Solutions" the main purpose is that it explains how different materials conduct electricity. In this passage, they describe an experiment with sugar and water. It says that when sugar is dissolved in water, the solution does not conduct electricity because there are no ions in the solution. It also describes experiments with vinegar and ammonia. It says that they work well as a mixture because the ammonia reacts with the acid in vinegar and hey form a lot of

The experiment will start with two ice cubes. One will have nothing added to it, the other will have ½ tsp of salt sprinkled over it. Each will be separate on two different plates/containers. Time will be kept with a stopwatch, and notes will be taken throughout the experiment on the percentage of ice that has melted at certain points in time.

After 5 min passed the plastic container created a thin layer of ice surrounding the container.

The specific property observed in this lab was the freezing point depression caused by the additives. This is the change in the freezing point between a standard solvent and said solvent with added solutes. This changes the entropy of the system, making the properties change somewhat, lowering the freezing point itself with the addition of more solute. Hence, the term ‘freezing point depression’.

Do ionic compounds conduct electricity as (3 points) Solids No Liquids Yes Aqueous solutions (when the ionic compounds are dissolved in water) Yes Do covalent compounds conduct electricity as (3 points) Solids no Liquids No Aqueous solutions (when the covalent compounds are dissolved in water) No Part I Lab Insert completed data tables for each part of the lab. Be sure that the data tables are organized and include units when necessary. Melting Point (4 points) Conductivity (4 points) Part II Conclusion Answer the following questions in your own words, using complete sentences. Based on your observations in the lab, categorize each unidentified compound as ionic or covalent. Explain in one or two sentences why you categorized the