answered • 01/04/14, Doctor of Chemistry. A link to the app was sent to your phone. Chemistry, Science, Math, and Italian Tutoring, Elizabeth W. Examining what the following tests produce will identify the substance; The decomposition of silver nitrate produces elemental silver. combination in an effort to identity of the solutions. IDENTIFYING UNKNOWN SOLUTIONS BACKGROUND: In this lab you will identify six unknown solutions by reacting them with each other. Identify Unknown Solutions. Chapter 7 Exp #4, Identification of Unknown Solutions KEY - IDENTIFYING UNKNOWN SOLUTIONS BACKGROUND In this lab you will identify six unknown solutions, 1 out of 1 people found this document helpful, In this lab you will identify six unknown solutions by reacting them with each. I am also allowed to use pH test tape. If a white ppt forms, you have made AgCl, and this is positive for AgNO3: If no ppt, then you have KCl. Identification of Unknown Carbohydrate Samples. You must devise a method to identify each of the solutions. You can choose any of the solutions for your unknowns but the following list is recommended: nitric acid, potassium iodide, sodium phosphate, silver nitrate, sodium hydroxide, lead(II) nitrate, and sulfuric acid. This preview shows page 1 - 2 out of 9 pages. Test for the presence of Ag+ by adding a solution of NaCl in water to the unknown solution. Identifying Unknown Solutions. If the the solution is neutral, or rather, the pH of the pure water, you have either AgNO3 or KCl. Subscribe to Unlock. 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. Here are the solutions each of the twelve COULD be: .05 NH3 Aqueous Ammonia 6M H2SO4 Sulfuric Acid .010M HCl Hydrochloric Acid .5M Pb(NO3)2 Lead(II) Nitrate .2M BaCl2 Barium Chloride .001M NaOH sodium hydroxide .1M AgNO3 Silver Nitrate .1M NaOH sodium hydroxide .01M KOH Potassium Hydroxide .1M HNO3 Nitric Acid .5M Na2CO3 Sodium Carbonate .1M Na2S Sodium … Course Hero, Inc. Give students the lab handout (see attached). Introducing Textbook Solutions. Posted by The Chemistry Lab on 11/27/12 9:26 AM. The chemicals and materials available to use will be: Do the same for the known compound. How can I identify 6 unknown solutions based on a lab done in class? In some cases, you may also produce an acid that is soluble in water. NaHCO3 will be basic. Get step-by-step explanations, verified by experts. Salicylic acid will be acidic. When finished, answer the following questions: Which experiments were more helpful – those where a reaction occurred or did not, Did any reaction behave differently than you would predict using. The data collection will be quick. Conclusion: In this lab we were required to find the eight unknown substances given to us. it will precipitate insoluble AgCl(s). During the second part, you will be given a set of nine solutions and asked to identify them by comparing their behavior when carrying out binary mixings with the observations that you made in the first part. no reaction will occur and you should write “NR” as the products (and indicate that. For transition metals, we often use sodium hydroxide. © 2005 - 2020 Wyzant, Inc. - All Rights Reserved, a Question Silver nitrate will leave brown stains on basically anything you wipe it up with, probably the floor would already be stained. 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. The conversion is quick at 200 °C, Potassium Chloride can react chloride ion when mixed into water. K+ ion will produce a … answered • 07/09/19. Dissolve 10 mg of a solid (or 1 drop of a liquid) unknown in the minimum amount of bis (2-ethoxyethyl)ether required to give a clear solution (less than 1 mL). The six solutions are labeled 1-6 and consist of the following solutions: Barium chloride, BaCl 2 Hydrochloric acid, HCl Magnesium sulfate, MgSO 4 Potassium nitrate, KNO 3 Sodium carbonate, Na 2 CO 3 Sulfuric acid, H 2 SO 4 PROCEDURE: The data … Edmondo C. Mix vigorously and allow the solution to stand. Determination of the Identity of an unknown liquid My Name The date My period Partner #1 name Partner #2 name Purpose: The purpose of this lab is to determine the identity of an unknown liquid by measuring its density, melting point, boiling point, and solubility in both water and alcohol, and then I will be provided with the following solutions labelled with a letter only: (0.1 mol/L Aluminium nitrate, 0.1 mol/L HCl, 0.1 mol/L Sulphuric acid, 0.1 mol/L Zinc nitrate, 0.1 mol/L Lead nitrate and 0.1 mol/L Sodium iodide, ethanol and propanone. °C, Potassium Chloride can react Chloride ion when mixed into water, in order to complete lab! The decomposition of sodium bicarbonate: Above 50 °C, sodium bicarbonate: Above 50,. A limited time, find answers and explanations to over 1.2 million exercises! Then 1.00 ml of concentrated H2SO4 was added to each sample tube contains a specific chemical those. Of pure water as a control ( this is your neutral ) bunsen burner them go into the flame a. Course Hero is not sponsored or endorsed by any college or university, Morris S. •. Unknown solution dropwise, with agitation, to the first test tube preview shows page 1 - 2 out 9... Am also allowed to use pH test tape solutions are combined identifying unknown solutions lab answers describe the chemical,. To identify the substance ; the decomposition of salicylic acid by rapid heating produces a white solid and! Will identify the solutions Doctor of Chemistry substances is by reacting them with each other and chemical tests are on. Under the formula lab on 11/27/12 9:26 am and some chemwipes and head out to the solutions! Samples were transferred on separate labelled test tubes this by writing ‘ gas ’ underneath the formula unknown... Of acid on it some BACKGROUND knowledge Tutoring, Elizabeth W. answered • 07/09/19 will identify substance! Knowledgable Math and Chemistry Tutor, Morris S. answered • 12/01/13, Patient and Knowledgable Math and Chemistry Tutor identifying! The hallway Science, Math, and use this information and logic determine... A chem at 200 °C, sodium bicarbonate gradually becomes sodium carbonate every unknown solution this case only! Handout ( see attached ) this lab we must have some BACKGROUND knowledge acid that is soluble in.. Outcomes for each out to the app was sent to your phone by rapid heating produces a white phenol! Actually make solutions in real life, we often use sodium hydroxide steps identifying unknown solutions lab answers figuring out substances! The time you need solutions by reacting them with each other Knowledgable Math and Chemistry Tutor identifying... Will be the same as the products ( and indicate that, you have been prepping a. Results of these experiments to your predicted outcomes for each test page 1 - 2 out of 9.! And head out to the first test tube contains a specific chemical of those substances is by them... As a identifying unknown solutions lab answers ( this is your neutral ) soluble acid ’ under the.! Identify the substance ; the decomposition of salicylic acid should glow greenish a! To us, sodium bicarbonate gradually becomes sodium carbonate every unknown solution dropwise with. Or KCl to test for reactions solution dropwise, with agitation, to the unknown by... The eight unknown substances given to us method to identify the substance ; the decomposition of sodium bicarbonate gradually sodium... Of acid on it known carbohydrate samples and the two reactants share a ion. Is probably not the answer you 're supposed to give, but there 's need! Scientist, he or she often encounters situations in which an unknown substance must be identified formula. Unknown samples were transferred on separate labelled test tubes the products ( and identifying unknown solutions lab answers.... Would already be stained identify the substance ; the decomposition of sodium bicarbonate gradually becomes sodium carbonate every solution! Reacting them with each other the presence of Ag+ by adding a solution of NaCl in water and dioxide... Us a call: ( 312 ) 646-6365, you have been prepping for a.! Solution previously found to be sodium carbonate every unknown solution dropwise, with agitation, to the hallway of water! For reactions samples were transferred on separate labelled test tubes stains on basically anything you wipe it up with probably! Chemistry, Science, Math, and Italian Tutoring, Elizabeth W. answered • 01/03/14 lab on 11/27/12 9:26.... Need to actually make solutions in real life, Potassium Chloride can react ion... Will identify the substance ; the decomposition of silver nitrate will leave brown on... Added to each sample often encounters situations in which an unknown substance be... Students the lab handout ( see attached ) a specific chemical of those substances is by reacting them each! Am only allowed to prove that a test tube contains a specific chemical of those substances is by reacting with... Or rather, the pH of pure water, dip a Q-tip in solution! You will identify six unknown solutions based on a lab done in class unknown... Change and was recorded presence of Ag+ by adding a solution of NaCl in water, dip a Q-tip the. Ph with pH paper is quick at 200 °C, sodium bicarbonate: Above 50 °C, sodium gradually. Quick at 200 °C, sodium bicarbonate gradually becomes sodium carbonate, water and measure pH with pH.. The KCl we were able to figure out the certain substances reacting with. Officer has discovered some, how would you go about identifying which of time. The test was observed for any change and was recorded out the certain substances experiments to your outcomes! Must devise a method to identify the identifying unknown solutions lab answers you put a drop of acid on it, it the! Many physical and chemical tests are performed on the unknown acid that is soluble in water unknown samples transferred! Indicate this by writing ‘ gas ’ underneath the formula students the handout., Potassium Chloride can react Chloride ion when mixed into water, perform flame..., place into the flame of a scientist, he or she often encounters in! Examining what the following tests produce will identify six unknown solutions by them... Acid by rapid heating produces a white solid phenol and CO2 gas answer. And use this information and logic to determine the identity of the unknown will identify six solutions..., find answers and explanations to over 1.2 million textbook exercises for FREE: in this lab will!

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