@sebsquared: GCSE Chemistry Revision - Metal ion flame tests. This is a classic experiment that always appears on Triple Chemistry papers for all the exam boards (AQA, OCR, Edexcel, WJEC/CBAC), but you may want to check if it appears on your combined specification. Either way it’s fun as hell. In this easy #experiment we burn metal salts to see what colour the metal ions emit as they are heated. Copper goes green, calcium an orange red, lithium a crimson red and potassium lilac. #gcse #revision #chemistry #GCSEs