Chemical Change Lab Report

According to my data in the ziplock bag experiment, it supported the Law of Conservation of Mass because before the experiment our total of all the substances added to 32.3g before and after the experiment. Evidence Name Mass (g) Before Mass (g) After Mass (g) Difference

What was the Effect of the Initial Temperature of Heavy Cream on the Mass of Milk Fat Formed? Purpose The purpose of this lab was to determine how temperature affected the mass of milk fat formed from heavy whipping cream, and which initial temperature formed the milk fat with the greatest mass. Background A colloid is defined as a solution containing particles that are sized between 1-1000 nanometers and are dispersed throughout the entire solution, never settling to the bottom (Law, 2017).

In this experiment, the evolution of the copper cycle was observed through a series of reactions. Four different copper compounds are formed through different reactions to inevitably lead to the recovery of Cu(s). This primary goal of this experiment was to study the Law of Conservation of Mass and perform 5 reactions on copper compounds. As Jenna Winterberg states in her book “Conservation of Mass,” the first part of this law is that mass or matter cannot be created. The second part of the law is that mass or matter cannot be destroyed .

In the book The Martian, Mark Watney survives on Mars due to the chemistry concept involving physical, chemical and nuclear changes, examples include him burning rocket fuel to make water and maximizing the use of his oxygenator and water reclaimer. Despite there being some other concepts that aided Mark in his survival, the way he understood physical, chemical and nuclear changes greatly increased his chances of living. To break it down, a physical change is any change in matter that involves a substance going from one state to another. A chemical change is when the substance is changed from its initial make up. Then, a nuclear change is when the nuclei can break apart to from a different element all together.

For this reason, three different molar masses were calculated. This ensures that calculations were accurate for each trial. The first trial saw a large percent error of 19%. This error was caused because a few bubbles of butane gas escaped the graduated cylinder, decreasing the volume of butane gas in the cylinder. The percent error associated with the second and third trial was much better than that of the first trial.

The Relationship between Molecular Weight and the Rate of Diffusion of Substance Anthony Earl D. Cristobal Group 1 Sec. U-7L 16 October 2014 Abstract The relationship between the molecular weight and the diffusion of the substance was determined using two laboratory experiments. In the first experiment, a horizontally placed glass tube was set.

To determine the rate of reaction there are many method to be used for example, measuring the mass after the product has been added and measuring the difference in mass on the duration of a digital scale. Another method, which will be used in this experiment is using a gas syringe to measure the volume of the gas which has been produced. The cylinder inside, will be pushed out to show a quantitative presentation of the volume produced by the reaction. Hypothesis

As it can be seen from the graph, the highest percentage change in mass was in the pure water, the percentage was constituted

Our experiment consists of adding one tablespoon of baking powder to each two cupcakes. There will be ten cupcakes in all and two will be controls, without baking powder. We will figure out which cupcake is the most “perfect” meaning the most fluffy, its circumference and height will be measured. Baking powder contains sodium bicarbonate, dry acid, and cream of tartar. These ingredients chemically changed out mixture into cupcakes.

The other time where mass could have been lost was during reaction 3, more specifically each time the liquid was decanted. Although a few black sand-coffee grains of the copper (II) oxide lost do not seem like a significant amount, they do have an impact on the final result, and each time a few of the grains were accidentally decanted could have an impact on why our final recovered mass was less than the initial amount that we began

Chapter 2 Fundamental Building Blocks: Chemistry, Water, and pH 1. Cells that make up complex living things do what they do because of a chemical reaction 2. Repulsion & bonding, latching on & re-forming, depositing & breaking down what makes people plants and birds function at this level is chemistry 2.1 Chemistry’s Building Block: The Atom 1. Matter could defined as anything that takes up space and has a mass 2. Mass it’s a measure of matter in any given object 3.

Then the balloon is lifted up so that the baking soda runs into bottle to react with the vinegar inside. Immediately the balloon is inflated by the carbon dioxide formed. The baking soda is kept constant when the experiment is repeated for another different amount of vinegar. Results/Findings When sodium bicarbonate and vinegar mix,

The motion and spacing of the particles determines the state of matter of the substance. Since the spacing between the molecules determines its state, the end result was a change of state from liquid (water) to gas (water vapor). What forms of Change of State did you observe? How and where did you observe them?

An error that occurred during the lab for Copper was; there were air bubbles trapped in the metal shot which resulted in a higher mass and volume. This error effected both the mass and volume

Additionally, we had to conclude how mass plays a role in the amount of force the object has upon hitting the ground. Going into this experiment, our group already had a large amount of background knowledge, due to the many Log Questions regarding