2. Add 8cm³ of sodium carbonate to each tube using a measuring cylinder. 3. Measure out the strontium nitrate for each boiling tube and add it (boiling tube 1 contains 1cm³, test tube 2 contains 2cm³ and so on). 4.
The purpose of this experiment was to identify the two components of an unknown mixture through diverse experimental techniques such as recrystallization, extraction, melting point, and acid-base reactions. From this, the group to which these two compounds belong to had to be determined. These groups are: Carboxylic Acids, phenols, and neutrals. By determining the melting points of the two unknown compounds, these values were compared to the values of melting points in the chart and the proper compound was selected. For the case of this experiment, the unknown mixture contained, 4-methylbenzoic acid.
Molar Relationships: What Are the Identities of the Unknown Compounds? The purpose of the experiment was to identify unknown compounds using knowledge on the concept of mole. The guiding question for this experiment is what are the identities of the unknown compounds? The numbers of moles and the identities of the compounds are the only given. To be able to identify the compounds the mass, molar mass and the number of moles will be needed.
Introduction A way to determine the molar mass of an unknown substance is to use other properties of that substance and solve for desired information. In this experiment, a colligative property, like the freezing point of an aqueous solution of the unknown substance, was used to find the molar mass of the substance. With the molar mass discovered, the identity of the substance was found. Material and Methods First, a Vernier temperature probe was attached to a plastic rod using rubber bands.
4. Measure your bears from top to bottom (length), from side to side (width), and from front to back (height). Use your measurements to calculate the volume. Record your data in the data table. 5.
Analysis - To initially get the position vs time graph, the whiteboard ramped was marked every half meter and four time trials were done going to every mark. the times were then averaged and plotted on a graph. With each average time a velocity was calculated by distance/time and those were averaged to find the velocity (because the buggy was a constant speed there is only need for one velocity). With this, it turned out the slope of the position time graph was the velocity. If there was a non constant velocity, the derivative of the position time graph would yield the velocity for the specific time.
Second, the experimenters has to fill up a measuring cup until the water reaches 200 mL. Third, the experimenters will fold the paper towel in half three
Determination of molar mass of an element and a compound. Introduction: Aim: To determine the molar mass of an element, copper, and a compound, barium sulfate. Background Information: In this experiment, the limiting reagent was the copper oxide.
Tape • Tape • Board • Pen/ pencil • A roll of paper Procedure: 1. Place the buggy between the 2 meter sticks at 0 cm. 2. Lay the roll of paper across the meter sticks. 3.
On our first day, the egg in the vinegar increased in size and the eggshell dissolved. This happened because of the calcium carbonate in the shell of the egg and the acid in the vinegar. This is hypotonic because it causes the water to move through in the egg which causes the egg to get bigger in size. The mass of the first cup was 13.1g and the mass of the raw egg was 59.3g. After the egg and vinegar experiment, the mass of the new cup was 11.3g and the mass of the “shell-less” egg was 92.2g. On our second day, the egg in the corn syrup decreased in size.
Make a flow chart showing the changes that copper goes through. For each step, write out what phase (solid or aqueous) the copper will be in (e.g. the first step on your flow chart should be Cu (s) - solid). Define the terms decantation and filtration. Both of these terms describe methods for removing solids from liquid solutions. Decantation involves allowing solid particles to settle to the bottom of the container, then pouring the liquid out of the container leaving the solids inside.
By counting the difference of the vertical direction (rise) and the horizontal direction (run) then take the ratio of the rise over run to find the slope of the line , which should be the m in the y= mx+b
The purpose of The Law of Conservation of Mass Lab in class was to conduct an experiment (by combining acetic acid and baking soda) to prove that in any chemical reaction, the total mass of the reactants and the total mass of the products are equal. In our experiment there was nothing that would indicate a chemical reaction other than the formation of gas. When the baking soda fell into the acid (in both trials), bubbles were created and the balloon that was on the flask filled with gas. This formation of gas after the bubbles were created was the indicator that a chemical change had occurred. Also, we could tell that this was the only chemical change that happened during the trials because, things such as the color of the products, their
I. Purpose: To experimentally determine the mass and the mole content of a measured sample. II. Materials: The materials used in this experiment a 50-mL beaker, 12 samples, a balance and paper towels. III.
4. Analyze and experiment with the data. Look at the information you have collected from using arc mapping, sketches, timeline sequencing, pattern analysis, and flame analysis. 5. Develop your hypothesis.
