The lab started off by measuring critical materials for the lab: the mass of an an empty 100 mL beaker, mass of beaker and copper chloride together(52.30 g), and the mass of three iron nails(2.73 g). The goal of this experiment is to determine the number of moles of copper and iron that would be produced in the reaction of iron and copper(II) chloride, the ratio of moles of iron to moles of copper, and the percent yield of copper produced. 2.00 grams of copper(II) chloride was added in the beaker to mix with 15 mL of distilled water. Then, three dry nails are placed in the copper(II) chloride solution for approximately 25 minutes. The three nails have to be scraped clean by sandpaper to make the surface of the nail shiny; if the nails are not clean, then some unknown substances might accidentally mix into the reaction and cause variations of the result.
For example whip cream is white so if you add food coloring four drops and mix it up, that is a chemical reaction. Gas molecules expand in the space they're in and if there is no top they will expand out of the container
Double Replacement Lab Report Date Completed: October 8, 2015 Objective To analyze and determine if a chemical reaction occurred between two compounds using the concepts we learned in class. Also, if the chemical reaction occurred, to determine if it formed a precipitate or gas. Safety General Safety Precautions: Do not touch the chemicals Use of gloves and coats are recommended, use of goggles should be required Keep the work area clean Dispose of the chemicals properly, DO NOT dispose them in the sink Clean up your work station Wash your hand before and after the lab Make sure all chemicals are labeled correctly NEVER return chemicals to reagent bottles Use the wafting technique to smell the chemical Clean up spills immediately
1. A bacterial transformation is when a foreign DNA is inserted into the bacteria's original DNA to alter the genome for a certain outcome. This is usually done by using a plasmid to transfer and incorporate the foreign DNA into the original genome. First, bacterial cells are centrifuged to make a pellet.
Introduction During this lab, students observed that not all substances dissolve at the same rate. Many factors involved including the independent and dependent variables affect how distinct substances dissolve. Overall, the chemical reaction, “the amount of reactant that changes the product in a given time”, played an important part in this experiment, when proven how a substance can change into another element by either emitting or absorbing energy. (Tro, 2018).
Hana Phan Mrs Thomas Honors Chemistry P. 2 9-20-17 Chapter 2 Booknotes 2.1 What is matter? matter - anything that has mass or volume volume - the amount of space an object occupies mass - a measure of how difficult it is to change the object’s state of motion atoms - the basic unit of matter molecules - a neutral group of atoms held together by chemical bonds physical properties - properties that can be observed or measured without changing the composition of matter state - the condition of being a gas, liquid, solid, plasma, or neutron star chemical properties - properties that can be observed only when substances interact with one another Matter is anything that has mass or volume. Volume is the amount of space an object occupies while
First it is organized into one chapter for each state of matter. Then it then has two additional chapters, one explaining the transition between states of matter and one hiliting the uses of each state. This resource rich book includes all of the necessary information to serve as a science reference for all three states of matter. It uses scientific terms yet keeps the text simple and clear. This book is also filled with fantastic pictures showing a variety of real world examples and up close scenarios where solids, liquids and gasses are in their transition phase.
Before the can was placed into the ice bath, the temperature was very high. This meant that the vapor pressure was also high; the molecules were moving fast, hitting the sides of the can with a lot force and hitting the sides frequently. When the can was placed in the ice bath, the water molecules in the can quickly became liquid when the temperature changed. There was a drop in kinetic energy, so the vapor pressure inside of the can became extremely low.
Kf ۰ m. By finding the freezing point of an unknown solution, it provides an opportunity to determine the molar mass of the unknown substance. Also, in this experiment a heating
The purpose of this lab was to measure the mass and volume of CO2 gas and calculate its density. To conduct this experiment, the group must have made sure that when moving the collecting bottle, the mouth of the bottle is covered by a group member’s hand. Also, the rubber tube must be taken out from the collecting bottle before taking out the stopper on the test tube. During this experiment, it was determined that it is important to keep the mouth of the collecting bottle covered with a group member’s hand while removing it from the water in order for nothing to come out and nothing to come in, keeping it a closed system. It was also determined that the volume of displaced water in the collecting bottle is the same as the volume of the gas because they both took
A phase of matter is a uniform with respect to both its physical and chemical properties. Matter undergoes phase transitions that change from one phase to another. A state of matter is a form that matter can take such as solids, liquids, gases, and even plasmas. There are some other states of matter that appear under extreme conditions but these are the main ones you use in your everyday lives. For example, imagine you have gatorade and water.
This lab contains two experiments that both test the knowledge of the gas law and how it applies to the state that is necessary to form a cloud and to calculate the rate of effusion of CO2 (carbon dioxide) leaving a balloon. If carbon dioxide is placed into a balloon for a period of time, then the carbon dioxide will effuse out of the balloon at a linear rate, because of the pressure that the gas is placing on the wall of the balloon that will allow it to escape from the balloon's microscopic pores. If a match is placed into a flask with room temperature water and heated water, then the resulting cloud that forms in the heated water will have a higher volume and a higher pressure than the cloud that forms in the room temperature water. The
Yes, the steel ball rolling on the counter top moves with a constant velocity. The steel ball took 0.4 sec to cover a distance of 20 cm. The formula to calculate average speed equals to total distance over total time. So, 20 cm divided by 0.4 sec equals to 50 cm/sec. So the speed of the ball is 50 cm/sec.
Reaction Time Lab Report Research Question: How does the physiological stimulus of music affect the reaction time of a subject? Aim: The aim of this experiment is to see how reaction time can be tested in a variety of ways and can be affected by a number of environmental and physiological factors. Hypothesis: I have reached the hypothesis that the reaction time will increase whilst the subject is listening to music.
To be able to find the best container to keep soups hot will be significant to people of different ages. The parents will benefit from the study because they are responsible for the food that their children should eat. They can protect their children from food poisoning because the food or soup will not spoil easily. The office workers, teachers, and any laborers can also benefit from the study. They tend to save money and prepare their own food.
