1 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. Investigate the preparation of soluble salts, 4. Often we want to determine the composition of a mixture, and a common approach is to separate the components of the mixture. Identifying the ions in an ionic compound using chemical tests. We … Compounds can be identified by two examinations like. Run anion tests to determine present anion (carbonate, sulfate, nitrate, acetate, chloride… Hold the loop with the solid ionic compound in the hottest part of the flame and record the characteristic colour. Even if you find one, you can follow few steps mentioned below in identifying the unknown compound. 2 0 obj But due to many chemical experiments and space explorations, many new compounds emerge which need to be identified. 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. %PDF-1.5 2. Repeat for all the solid ionic compounds available, cleaning the wire loop each time. �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���[email protected]�P�uP � E�@�U�,2�Q8y����kX�;��3��3�� Identifying the ions in an ionic compound using chemical tests. Investigate the reactions of carboxylic acids, Home Economics: Food and Nutrition (CCEA). Chemical evaluation Dip the clean nichrome wire in concentrated hydrochloric acid and the wire onto the solid ionic compound which is sitting in a watch glass. Identifying Unknown Compounds. For this experiment, the possible categories of the unknown are alkane, alkene, alkyl halide, alcohol, phenol, amine, aldehyde, ketone, and carboxylic acid… Physical evaluation. When identifying unknown ions present in a solution, we will focus on either the anion OR the cation, never both at the same time. stream 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. In this experiment you will carry out several tests to identify the cations and anions in ionic compounds. 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. Overview: In this experiment, you will combine both spectroscopy and qualitative tests to identify an unknown organic compound. Dip the loop in the concentrated hydrochloric acid and place in the hot blue flame of the Bunsen burner. 1. Chemistry Lesson: Identifying Ionic vs. Molecular Compounds endobj endobj impurities are removed. Our tips from experts and exam survivors will help you through. endobj 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). In this experiment you will carry out several tests to identify the cations and anions in ionic compounds. 4 0 obj Repeat until the flame is no longer coloured, i.e. Take a piece of nichrome wire with a loop at one end. Classify unknown compound based on physical characteristics of said compound. <> <>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 612 792] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> 1. ���tG��YX�`H� #f�쁠��D�b +a\�rȩ[email protected]����6�9A&�͔E�`2���ݔJ7)�}��[F&Z����C. 3 0 obj <>>> :�e�&���zœ�n��� 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���"[email protected]�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�|,[email protected]�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��?