identifying unknown ionic compounds

Investigate the preparation of soluble salts, 4. Investigate the reactions of carboxylic acids, Home Economics: Food and Nutrition (CCEA). 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… �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 Determine cation present in compound based upon a flame test. Hold the loop with the solid ionic compound in the hottest part of the flame and record the characteristic colour. Repeat for all the solid ionic compounds available, cleaning the wire loop each time. When identifying unknown ions present in a solution, we will focus on either the anion OR the cation, never both at the same time. The unknown compound was then tested for solubility in water, toluene and acetone. Identify the ions in an ionic compound, 7. 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). Even if you find one, you can follow few steps mentioned below in identifying the unknown compound. Take a piece of nichrome wire with a loop at one end. endobj Chemistry Lesson: Identifying Ionic vs. Molecular Compounds endobj 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. 2. 2 0 obj Identifying the ions in an ionic compound using chemical tests. Dip the clean nichrome wire in concentrated hydrochloric acid and the wire onto the solid ionic compound which is sitting in a watch glass. ���tG��YX�`H� #f�쁠��D�b +a\�rȩB@����6�9A&�͔E�`2���ݔJ7)�}��[F&Z����C. Identifying the ions in an ionic compound using chemical tests. Classify unknown compound based on physical characteristics of said compound. Read about our approach to external linking. But due to many chemical experiments and space explorations, many new compounds emerge which need to be identified. 1. Chemical evaluation �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�� 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. x��[[���~7��0�����A����� ��y�����a�TEʛ���\fHɡd�0��p.���ˌޝ�r�oZ�����6�십���}ݶ��_����۲������Oo���H2O�P�ǡ�t|��/��Ƿo~_�����U�Vb}�VO�p�?��U���V����W9�m�p��o�0��;�����O��@ a��q��p��a�����yq�RY�E��{�t���x�p��_��x��"����o�52�5��$E��^��%��xZ�' F�aޮ�U����i� PEҋ{9�hU�{J�c�s����+|�����R�JB/��y4�m�|U-�Z"�;��ʈ?W/�D���~���u�z�W�x����H�m\jSnoq��7i�-[J×"NO���]�}�F����'~��G4�ˁ�����`z���"aj@XGM�y>,�)���k)���Uӊ�� [�>��wn� �{�e~ݬcp�g�/W�?�&���=ٹQM�*�X����&��w��l%��r� �^�s"��d2vQY�eE�؊4��*�"��OU{��� ��$��\��t{�"5�Mj|���/uC�+ ~H�e�~hD���'���D�7#���jA�~.� ,@����h/�U�j�D^m1b�{z؈��.ۢ;��N����65���FV������Y�%,�Mg���e����^_s4u"(��Uy����V&x��@q!e����U�;6��`f�#��LnE^Z�˥��RES_�'AtU�`�ۂ�a�|,A$@�L����+iDvQ���0 �;��Ҫ���ҋ�����:>��uj�G{Q�`��;��8�p2��ES�r��3n�n,�=���䚢b/��)F�UQ� ��17���l� Y��&�P����/��E �#���8�� �����3���Kn�>��Б;\�i�p:��Rկ.,�#/��ᮥ%��x�/���������Z��u ���{�P�U��'F6��JY�6��t(�D ��n��ɪ�]W�h)���n f1�#=��*�i;*\;���w!�HF�!8��GD��q��? Physical evaluation. stream You will need to use your knowledge of solubility rules and precipitation reactions to devise and carry out a plan to identify unknown solutions. %PDF-1.5 <>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 612 792] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> Run anion tests to determine present anion (carbonate, sulfate, nitrate, acetate, chloride… 1. <> <> :�e�&���zœ�n��� %���� Dip the loop in the concentrated hydrochloric acid and place in the hot blue flame of the Bunsen burner. Identifying Unknown Compounds. 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. Often we want to determine the composition of a mixture, and a common approach is to separate the components of the mixture. 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 Our tips from experts and exam survivors will help you through. l�t�>���6�3PkUXF��ĠҾ" (*�x�%H�Nk�oMs!�0Z� Repeat until the flame is no longer coloured, i.e. endobj Determine the mass of water in hydrated crystals, 3. Compounds can be identified by two examinations like. Overview: In this experiment, you will combine both spectroscopy and qualitative tests to identify an unknown organic compound. <>>> In this experiment you will carry out several tests to identify the cations and anions in ionic compounds. In this experiment you will carry out several tests to identify the cations and anions in ionic compounds. 1 0 obj We … 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… 3 0 obj impurities are removed.

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