Testing salts for anions and cations introduction chemists often have to identify the composition of unknown substances this experiment involves identifying the cations and anions in various salt solutions. Lab 3: concentration determination of an aqueous solution and sulfate ions initially coming together to form a salt, followed by evaporation of the residual water mn2+ (aq) the concentration of an unknown solution can then be determined graphically by. Page i-49/ determination of an unknown chloride determination of an unknown chloride the determination of a soluble chloride salt concentration is a classic titrametric analysis. In this lab students will make qualitative observations of flame color, a property of metals, to identify unknown metals in salt compounds. 1identification of unknowns introduction a variety of chemical tests can be used to identify an unknown substance in this exp. Chemistry 101: experiment 7 page 1 experiment analytical balance weigh about 03 g of the unknown salt into a 250 ml erlenmeyer flask 2 from your base buret add about 50 ml of the standard naoh to the sample record the initial.
This feature is not available right now please try again later. Chemistry 12 santa monica college unknown salts project page 1 of 13 new brief: discarded chemicals found in santa monica waste dump. Identification of an unknown carbonate purpose: the waste products in this lab are nacl (table salt) or kcl (salt substitute) and can be flushed down the sink with water procedure: write out the calculations for your prelab and bring them with you to lab. Start studying matter: solutions and solubility review learn vocabulary, terms, and more with flashcards a chemist dissolved crystals of an unknown substance into water at room temperature he breaks the salt into two smaller pieces and adds it into the water. Ngss news implementation curriculum planning classroom resources the metal salts used allow the burned splints to be safely disposed of in the trash, but the teacher, to avoid any possibility of a repeat steps 1-4 with the unknown salt determine which ion is present in this. The cold pack experiment lab allowed us, the students, to apply theories learned in class to actual real life experiments such experiments prepare.
I need to know, and have tried to figure out: 1 percentage weight loss on heating the solid - i tried doing this by just heating the salt in a glass it melted then when it cooled i weighed it and it weighed more than the starting point, which was weird, so i probably did something wrong. Dispose of the anhydrous salt in the waste chemical container at the end of the experiment 3 materials needed: an unknown hydrate salt: hydrates name. Chemistry 108, spring 2008 lab 7: unknown white powder lab goals: the goal of this lab is to identify all five of the unknown white powders you are given. Important notes on salt analysis our excursion in qualitative analysis concludes with salt analysis in this activity, you will receive an unknown solid salt, and you will attempt to identify its components (cation(s) and anion) following the. Solubility of an unknown salt must work with a lab partner, your choice or mine for today your amount of chemical determines your lab station.
In the second week of the experiment, you titrated samples of an unknown iron(ii) salt with the same kmno 4 solution, in order to determine what % by mass of fe it contained. What is the flame test the flame test is used to visually determine the identity of an unknown metal of an ionic salt based on the characteristic color the salt turns the flame of a bunsen burner. Lab#: 20 skill: planning and designing observations: a student is given a small beaker containing an unknown salt, x the salt is crystalline, deliquescent and colorless. What are the density and the identity of an unknown salt your team will be assigned a white unknown salt devise and carry out an experiment to determine the density of the salt and use table 3 to identify the salt describe the method you developed to solve.
Experiment 9: solubilities pre-lab questions: part i: solubility of some selected salts table i contains a list of salts whose solubilities are to be determined in this experiment part iii: identifying solutions of unknown salts.