These colors can be put on a bright line spectra which shows every color that the element produces in a flame test. After you have tared the weighing paper, measure out the 3. If you use graphs, they should have a caption in which you describe the contents of the graph. First, place a piece of weighing paper on the balance and tare it. Therefore, knowledge of acid-base titration curves is critical to the environmental scientist.
Other factors such as contaminates in the water used may have affected the results, but again every effort to minimalize such effects was made by using only deionized water. C Set up an ice bath by putting ice and water into the glass bowl and set it aside so you can cool the hydrochloric acid later in the experiment. Each key measurement needs to be reported appropriately. If leaf color change is related to temperature , then exposing plants to low temperatures will result in changes in leaf color. Stick the thermometer into the hydrochloric acid and wait until the temperature of the hydrochloric acid drops to about 20? If one can tell if a planet has oxygen on it based on its bright line spectra, research could be done to tell if people can live on the planet or not. Let us help you out — we can afford to spend some time on it.
References A listing of published works you cited in the text of your paper listed by author or however the citation style you are using requires the citation to be listed. A crucial part of a lab is the proper writing of a lab report. This section is where you describe what happened during the experiment and whether the results turned out as you expected. A lab report is the description of all the events taking place in an experiment. We will use this data to determine the identity of our unknown from a list of possible unknown samples and physical data from the Chemical Handbook.
Or, you can leave the daunting part to us. This is where you interpret the data and determine whether or not a hypothesis was accepted. The introduction is other one paragraph or a single page. Experimental Materials and Methods This section should describe all experimental procedures in enough detail so that someone else could repeat the experiment. There are two different types of abstracts: informative and descriptive. The spatula with the salt solution was put over the flame. Put the calcium carbonate aside until you are ready to react it with the 1.
C Fill up a 400 mL beaker of water and heat it up until boiling on a hot plate. Repeat steps 17-23 4 more times until you have done a total of 5 trials for the rate of the reaction between 1. This would be a huge advance in science if it was possible to tell if people can live on other planets by knowing the elements on the other planets. Lecturer's comment 3: summarises the main reasons for any discrepancies and recommends improvements to overcome experimental limitations Standardised solutions might further improve the accuracy of the results. The first is what not to do, the second is a cleaned-up and much improved version of the same report.
Most people put food in their mouth, chew a few times and swallow their food, as if their sole focus was how quickly they could get their foods to their stomachs. Therefore, this information would be most useful for 200-level students as lab reports are often required for those courses. Check your lab manual or unit guide to determine which referencing style is preferred. To displace the water and measure the amount of time it takes to displace it we will use a water displacement apparatus that will allow us to take the carbon dioxide gas produced to enter a water chamber and displace the water from that chamber into a 25 mL graduated cylinder, and we will use a stopwatch to time how long it takes for 15 mL of water to be displaced. If they represent other schools or institutions, credit this too. Revisit these objectives in the conclusion to make sure that you are addressing them sufficiently.
Was the experiment a success? Most aquatic life forms cannot survive outside a pH window from about 4. If both variables are continuous, use a point graph. Once the temperature of the 1. Solve any equations brought up in the experiment. In the experiment we change the temperature of the 1. It is the most common type of abstract.
Notice that these statements contain the words , if and then. This should be a report of what you actually did, not just what was planned. If you increase the temperature of a reaction the rate will increase as well, but if you decrease the temperature the rate will decrease too. Give an overview of the experiment, which will help the reader visualize what you did. Sources of Error There are numerous possible sources of error. Elements are only in their excited for a brief moment. The doer of the action is someone else.
You may wish to describe ways the study might have been improved. They also explain how these matter undergo changes. In this experiment we will first calibrate our thermometers using ice and water, whose normal melting and boiling points are well characterized as 0. The titration of acetic acid with sodium hydroxide resulted in an equivalence point out of the range of methyl red. Need A Sample Lab Report? Although our measured melting and boiling points differed from the theoretical data by a few percent, this difference was very small leading us to believe that our results were quite good. Fill up the 300 mL Erlenmeyer Flask up to the 250 mL with water before each trial of the experiment is conducted. Record the amount of time it took for the water being displaced to reach the 15 mL mark on the 25 mL graduated cylinder.
The use of a catalyst will always increase the rate of a reaction because it provides a lower activation energy for a reaction to undergo successfully Ford 124-25. The independent variable is the one that you alter throughout your experiment. You can describe the main trends and account for any anomalous result. Temperature affects the rate of a reaction immensely. This indicator is unsuitable since it does not cover the range of the equivalence point which is 7. This means a bright line spectra can be used to identify any element.