describe how to carry out a flame test using nichrome wire and concentrated hydrochloric acid to identify metal ions;

Industrial Negative Ion Tester Meter for Sale - Renke Industrial Negative Ion Tester Meter for Sale - Renke

Can I use this ion counter in my country? I think the voltage and AC plug are different from Japan.

Barium sulfate isn't the only insoluble barium compound. Barium carbonate is also insoluble. So if you had a solution of, say, sodium carbonate, that would also give a white precipitate if you added barium chloride solution. Barium chloride solid is toxic; the 0.1 mol dm −3 solution is harmful. Wash your hands after use and warn students to do the same. (See CLEAPSS Hazcard HC010a)

Negative Ion Detector, Air Ion Counter - Renke

Provides a stable measurement as it is less likely to be affected by air flow and it uses highly accurate detector. This mode provides more accurate negative ion count data. It takes 35 seconds to complete the measurement.Video and supporting resources to support practical work based on synthesis of an organic liquid, the experiment includes the stages of preparation, separation and purification Jiang S, et al. (2018). Negative air ions and their effects on human health and air quality improvement. DOI: When an atom/molecule gains negatively charged electron(s), a negative ion is formed. When an atom/molecule loses negatively charged electron(s), a positive ion is formed. You should, of course, be ready to write a full equation for any particular reaction if you are asked. In each case, you will get a salt, carbon dioxide and water.