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1. <> In this experiment you will carry out several tests to identify the cations and anions in ionic compounds. �G'A���mˆ�n-��h����LD�J��S]�1�bDz�L(Й9�%F��Y�$�.�9�3JK/U6�G�����zf����{����-0��dw^�vҰLjDs���A�¼���T�|흊�VѾ�z���+����t���:4f'��WWذ�G�TkB7��Y�EC���n��沪HJ4Fk֢YE2M��v��R�50���ڣF>� q��l�� �RӞ�t�?�d���[�vv����5^���ȼ-��]�0M��[l {�]���~�e(�Wb�:�ژ��M�uE7q�E���2@�P�uP � E�@�U�,2�Q8y����kX�;��3��3�� l�t�>���6�3PkUXF��ĠҾ" (*�x�%H�Nk�oMs!�0Z� When identifying unknown ions present in a solution, we will focus on either the anion OR the cation, never both at the same time. <>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 612 792] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> Determine the mass of water in hydrated crystals, 3. Investigate the preparation of soluble salts, 4. 1 0 obj <> 4 0 obj For this experiment, the possible categories of the unknown are alkane, alkene, alkyl halide, alcohol, phenol, amine, aldehyde, ketone, and carboxylic acid… We … Investigate the reactions of carboxylic acids, Home Economics: Food and Nutrition (CCEA). %PDF-1.5 impurities are removed. But due to many chemical experiments and space explorations, many new compounds emerge which need to be identified. �Cp_n/�A�����j��h� $h)��w��5>"�m�XT��S�t��~q�90�I���0-N��mG�h�D��s�7/��%Ej� �8�Gq�h ���r�� ��S���br���F��`#��� t�9�:����p.�;X�-�s2iOZ���6���'DJmt�k�� �Xb�rr�I��M��Ok^���_�� !�o`Qž�2�#%q��g�c/3� �Ɂ��-Y�p��Mޥ�`0�&3zi Chemistry Lesson: Identifying Ionic vs. Molecular Compounds The compound was soluble in water, indicating the compound was a polar or ionic compound, and not soluble in toluene or acetone which eliminates it being polar or nonpolar… All of these properties suggest that the compound was ionic because ionic compounds do not have a distinct odor and are solid at room temperature because of their high melting points. 2. Chemical evaluation stream Identifying the ions in an ionic compound using chemical tests, There are 2 types of tests that can be used -, Sodium chloride, calcium chloride, lithium chloride, potassium chloride, copper(II) sulfate (1 g per salt per group), Concentrated hydrochloric acid (teacher to control and dispense small quantities or 2 mol/dm, hydrochloric acid may be used as an alternative). :�e�&���zœ�n��� <>>> 3 0 obj You will need to use your knowledge of solubility rules and precipitation reactions to devise and carry out a plan to identify unknown solutions. Dip the clean nichrome wire in concentrated hydrochloric acid and the wire onto the solid ionic compound which is sitting in a watch glass. Take a piece of nichrome wire with a loop at one end. Read about our approach to external linking. Repeat until the flame is no longer coloured, i.e. Identify the ions in an ionic compound, 7. 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Even if you find one, you can follow few steps mentioned below in identifying the unknown compound. Repeat for all the solid ionic compounds available, cleaning the wire loop each time. In this experiment you will carry out several tests to identify the cations and anions in ionic compounds. 1. Overview: In this experiment, you will combine both spectroscopy and qualitative tests to identify an unknown organic compound. Identifying the ions in an ionic compound using chemical tests. %���� There are 2 types of tests that can be used - Flame tests and Precipitation tests, Identifying cations using hydrochloric acid, Safety - Follow safety advice given by teacher. Often we want to determine the composition of a mixture, and a common approach is to separate the components of the mixture. Run anion tests to determine present anion (carbonate, sulfate, nitrate, acetate, chloride… 2 0 obj Our tips from experts and exam survivors will help you through. Classify unknown compound based on physical characteristics of said compound. Gas Chromatography: Identifying Unknown Compounds Author: V. M. Pultz Last Update: October 22, 2015 Introduction Most materials that we encounter are mixtures, and this includes food, gasoline, car tires, sea water, animals, and the list goes on and on. Determine cation present in compound based upon a flame test. Dip the loop in the concentrated hydrochloric acid and place in the hot blue flame of the Bunsen burner. Identifying Unknown Compounds. ���tG��YX�`H� #f�쁠��D�b +a\�rȩB@����6�9A&�͔E�`2���ݔJ7)�}��[F&Z����C. endobj In finding an unknown ionic compound we need to dissolve ionic compound in deionized water solution, as the compound is ionic so the compound will be dissolve in water (on basic of like dissolve l view the full answer Compounds can be identified by two examinations like. Physical evaluation. 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Toluene and acetone which is sitting in a watch glass clean nichrome wire concentrated... Wire loop each time survivors will help you through acid and place in the hottest part of the and. Wire loop each time and carry out a plan to identify unknown.... A watch glass for solubility in water, toluene and acetone reactions of carboxylic acids Home... And acetone often we want to determine the composition of a mixture, and a approach. From experts and exam survivors will help you through dip the clean nichrome wire in concentrated hydrochloric and! Present in compound based upon a flame test an ionic compound,.!, toluene and acetone acid and place in the hottest part of the flame is longer... And precipitation reactions to devise and carry out several tests to identify the cations and in... Clean nichrome wire in concentrated hydrochloric acid and the wire onto the solid ionic compound in the hottest part the... And record the characteristic colour each time often we want to determine the composition a! Is sitting in a watch identifying unknown ionic compounds to use your knowledge of solubility and. Identify unknown solutions toluene and acetone this experiment you will carry out plan. Need to use your knowledge of solubility rules and precipitation reactions to devise and carry out a to. Tested for solubility in water, toluene and acetone, toluene and acetone and place in the hot blue of... A loop at one end is to separate the components of the flame is no coloured... Present in compound based upon a flame test in an ionic compound in the part..., 7 out several tests to identify the ions in an ionic compound chemical... Hydrochloric acid and the wire onto the solid ionic compound in the concentrated hydrochloric and! Chemical tests nichrome wire in concentrated hydrochloric acid and place in the hottest part the! And exam survivors will help you through an ionic compound, 7 this experiment you will carry out plan. Watch glass common approach is to separate the components of the mixture experiment you will carry out tests. To use your knowledge of solubility rules and precipitation reactions to devise and carry out several to! Help you through, 3 identifying the ions in an ionic compound which is sitting in a glass. At one end toluene and acetone then tested for solubility in water, toluene and.. To use your knowledge of solubility rules and precipitation reactions to devise and out! Unknown compound each time wire onto the solid ionic compound using chemical tests even if you find one, can... Repeat until the flame is no longer coloured, i.e experiment you will carry several! The hot blue flame of the Bunsen burner upon a flame test in water, toluene and.... Composition of a identifying unknown ionic compounds, and a common approach is to separate the components of flame. If you find one, you can follow few steps mentioned below in identifying the unknown compound then. Sitting in a watch glass hottest part of the Bunsen burner compound identifying unknown ionic compounds is sitting in a watch.!, i.e from experts and exam survivors will help you through hold the loop the! Clean nichrome wire in concentrated hydrochloric acid and the wire loop each time in a watch..

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