identifying unknown solutions lab report
You should submit an Unknown Preliminary Report as soon as you have completed the experiments described below: For the solid unknown, you will take an accurate mp, an IR spectrum using the KBr procedure, solubility tests and, based upon an analysis of this information, do specific functionality tests as described in the manual. About 1.00 ml of Molisch reagent then 1.00 ml of concentrated H2SO4 was added to each sample. You will then apply what you have learned by ... solutions that give an acidic response (pH < 7) when tested with litmus paper. Any substance that turns yellow as a result of the previous step is proven to be a nitrate form and the darker of the two is a result of silver nitrate. Analysis of Unknown Solids Scientific Method Inquiry Lab Activities Introduction Identify five unknown substances by using only distilled water, vinegar, and phenolphthalein. Purpose: The purpose of this lab is to determine the identity of an unknown liquid by measuring It’s density and boiling point, and then comparing the results to the values for known substances. Sign in|Recent Site Activity|Report Abuse|Print Page|Powered By Google Sites. OBJECTIVE The main objective of this experiment is to carry out qualitative analysis to identify metal cations in unknown solution 1. �uߩCb����g����f�2X���C۴}�C���ja��r}�e���ښ@ c���9@��\� Advice from a Chemistry Tutor: Identifying the Unknown Solutions Lab. (Give the name or formula of the substance and the amount) (d) Explain how the results will allow you to determine which cation is present in the unknown solution? The solution that causes the Paper to turn red is identified as an acid (Hydrochloric Acid HCL). Abstract: In this lab an unknown, contaminated organic compound, “E”, was given to be purified and identified. A. 3 0 obj <> stream It was left undisturbed till it was 80 °C Step 2: While the water was heating, six test tubes were placed in a test tube rack and approximately 3mL of water, a glucose solution, a sucrose solution, starch solution, a fructose solution, and two unknown solutions were poured into each and labelled with their corresponding names. x��ZYo�H~��И' This experiment used three tests to identify which macromolecules (carbohydrates and proteins) were present in different sample solutions. %���� <>>> We were able to find the carbonate by combining the acid with all the other substances and see which one bubbles. One way is to measure its density at a given temperature. 1680 Words 7 Pages. Example 1: "An unknown labeled as letter G was given out by the lab instructor. Introduction When given an unknown substance, there are only a few ways to determine what it is. As you can see by the tables the first step we took was to find out the acid by using the PH paper. The test was observed for any change and was recorded. Tweet; One of the most common general chemistry lab experiments, both in advanced high school classes as well as introductory college courses, is the identification of a series of unknown chemicals. Identification of Unknown Carbohydrate Samples. Any pure substance has a specific density at a specific temperature. Predetermine that Solution F is Copper due to its initial blue coloration. lab report qualitative analysis for identification of metal ions. Approximately 1.00 ml of the known carbohydrate samples and the two unknown samples were transferred on separate labelled test tubes. In this experiment you will carry out several qualitative tests that will allow you to identify functional groups in organic molecules. The purpose of this experiment was to identify the unknown compound. methods were used to identify it? endobj Lab Report Sheet: Alkaline Earths and Halogens Part 1: Solubilities of Salts containing the Alkaline Earth Cations (3 points) 1. In this experiment, the student will determine if a chemical reaction has taken place when two solutions are combined, describe the chemical reaction, and use this information and logic to determine the identity of ten unknown solutions. We were given a table that allowed us to see what would happen if two chemicals would combine, whether they would turn to a solid or do nothing. Although it is often possible to establish the structure of a compound on the basis of spectra alone (IR, NMR, etc. Learn to use a variety of chemical and physical tests to identify these five common household substances, all … (c) What would you mix the unknown solution with? How can I identify 6 unknown solutions based on a lab done in class? To write balanced molecular, complete ionic and net ionic equations for reactions that occur between known solutions. CHEM 1405 - Identifying Six Solutions Lab Report (Version B) Objective: To identify six unknown solutions by comparing their reactions with those of six known solutions. %PDF-1.5 Place each unknown solution in a well plate and place Ph paper. �������c:�䓈��b^�m�^�>^==>bl���+��״u�y#jq��pO��km��D_c��#* +�Z�9z�wr3�BDX�N���Y��=�O� �.#2�vMY�Τ�����\S���3L�e���l��S�ǐ�w(Q�J½H�T ��K����N ��H��d�A/�C��a��ؖ��xv8�A> Density is defined as being equal to … Place each unknown solution in a well plate and place Ph paper. The tests were the iodine test, Benedict’s test, and the biuret test. Background: In this experiment you will react each of six known solutions with the other five known solutions. 4 0 obj Unlike quantitative analysis, which seeks to determine the quantity or amount of sample, qualitative analysis is a descriptive form of analysis.In an educational setting, the concentrations of the ions to be identified are approximately 0.01 M in an aqueous solution. <>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 612 792] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> The tests that were done to determine the identity of the compound include qualitative solubility tests, quantitative solubility tests, measuring solution conductivity, anion and cation test, flame test, and formation of precipitate. Qualitative analysis is used to identify and separate cations and anions in a sample substance. Be specific, but do not re write the lab manual. To write balanced molecular, complete ionic and net ionic equations for reactions that occur between known solutions. Place the solution that was found to be Hydrochloric Acid to each solution to find any at all reactions that would prove what solution is a carbonate. in my chemistry class we did a lab in which we were given 6 different solutions and had to mix all of them with each other and test the pH of the pure substances. �v���J��� Using background knowledge and research, determine the actual identities.