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This video is about positive and negative ion tests. Negative ion tests include the test for halides (chloride, bromide, iodide), sulfates and carbonates. Positive ion tests include flame tests and precipitation reactions of copper, iron (II), iron (III). The test for ammonium ions is also described. The final part of the video includes a talk through of past exam questions. These videos are designed to help with your GCSE & IGCSE chemistry revision. To keep up to date with my Science with Hazel videos and support: Visit my website: https://sciencewithhazel.co.uk/ Follow me on Instagram: / sciencewithhazel Add me on Snapchat: / sciencewithazel Like my Facebook page: / sciencewithazel Hazel completed her undergraduate degree at St John's College, the University of Cambridge. She then did a PGCE (Post-Graduate Certificate of Education) before qualifying as a science teacher. She now works full time as a professional tutor.