The Purpose of this lab was to determine the molar mass of an unknown volatile compound. We found it by placing the surplus volume of the liquid in a pre-measured flask and warming it up. As liquid turned to vapors, it vapors took place of air in the flask, evicting air and surplus of vapor from the hole at the top of the flask. When whole liquid turns to vapor and evaporated, we then removed the flask, in order to cool the remaining vapor in the flask. We weighed the flask then so that we can get the weight of the liquid. When flask was removed from the bath, amount of vapor was same as of the amount of the flask. Pressure of the vapor (inside the flask) is equal to the atmospheric pressure of outside. Also, temperature of vapor is identical
Compress the safety bulb, hold it firmly against the end of the pipette. Then release the bulb and allow it to draw the liquid into the pipette.
It was learned that changing the volume of the same substance will never change the boiling point of the substance. However having two different substances with the same volume will result in two different boiling points. The purpose of this lab was to determine if changing the volume of a substance will change the boiling point. This is useful to know in real life because if someone wanted to boil water to make pasta and did not know how much water to
The cold pack experiment lab allowed us, the students, to apply theories learned in class to actual real life experiments; such experiments prepare us for future tasks the will be put forth to determine. Our main trajectory through this assignment was to determine what our unknown salt was, through experimental analysis. The main purpose of this lab was for us to determine what the given unknown salt is. For this experiment, my group and I were given unknown salt 7. Information recognized before starting the lab, were the materials needed, background information on the math required to determine the unknown(s). In addition, other background sources before starting the experiment included having previous knowledge of chemical formulas, understanding concepts learned throughout class and how a calorimetry works. Furthermore in order to determine how to complete the lab, we needed information upon how to properly keep the temperature of the water from decreasing or increasing, and this required that we needed to know what an insulator is and how to use ...
This lab was designed so that we, the students, could learn how to determine the molar volume of a gas effectively.
Variables --------- During the experiments, the water will be heated using different spirit burners containing different alcohols. I will be able to change different parts of the experiment. These are the. Volume of water heated:
A hot plate is acquired and plugged in and if left to warm up. Fill two beakers with 0.075kg of water and record the temperature using a thermometer and record it. Place one of the beakers onto the hot plate and drop one of the metal objects in. Wait for the water to boil and wait two minutes. Take the object out of the water and drop it into the other beaker. Take the temperature of the beaker and record the rise in temperature.
Experimental Summary: First, my partner and I put the marshmallow and cheese puff on T-pins and used the Electronic Balance to measure the mass of each of them. Next, we put 100 mL of water in the 100 mL Graduated Cylinder and poured it into the 12 oz. soda can. We measured the temperature of the water with the thermometer. After
This is so I can calculate the mass which is lost in each alcohol. The spirit burner and alcohol I am using is on a brick under a tripod. On the tripod I placed a clay pipe triangle which holds a beaker containing 100ml of water. Light the spirit burner and stir the water with the thermometer constantly. When the temperature has risen to 30oC, I quickly place the top back on the spirit burner.
In this experiment I will use boiling tube, measuring cylinder, timer, hydrochloric acid(0.5 , 1.0, 1.5, 2.0, 2.5, 3.0 Moles), magnesium, test tube rack, clamp stand, a ruler and i will have to wear goggles to protect my eyes.
One of the best methods for determining mass in chemistry is gravimetric analysis (Lab Handout). It is essentially using the the mass of the product to figure out the original mass that we are looking for. Thus the purpose of our experiment was to compare the final mass in our reaction to the initial mass and determine the change in mass.
In a 100ml beaker 30mls of water was placed the temperature of the water was recorded. 1 teaspoon of Ammonium Nitrate was added to the water and stirred until dissolved. The temperature was then recorded again. This was to see the difference between the initial temperature and the final temperature.
The density was measured by using an electronic densitometer. This apparatus operate by using the Archimedes Principle, which states the apparent loss in weight of a body immersed in fluid, is equal to the weight of the fluid displaced (Orr et a.l, 2003).
The last part of experiment 5, was learning about specific gravity and temperature. Specific gravity does not have any units, it is unitless. When measuring for the temperature, we used a thermometer to calculate the Celsius of the water, 10% sodium chloride, and isopropyl alcohol. The specific gravity uses a hydrometer to measure the gravity of the liquids. Using the hydrometer, to figure out the measurements we have to look at it from top to bottom. The water for specific gravity was .998 while the temperature of it was 24
is impossible to specify a single best method to carry out a given analysis in