BBC1 年
Investigating exothermic and endothermic reactions
The slideshow describes an exothermic reaction between dilute sodium hydroxide and hydrochloric acid, and an endothermic reaction between sodium carbonate and ethanoic acid.
BBC1 年
Energy changes in chemical reactions
The slideshow describes an exothermic reaction between dilute sodium hydroxide and hydrochloric acid, and an endothermic reaction between sodium carbonate and ethanoic acid.
Interesting Engineering on MSN6 个月
Clean lithium extraction possible with new zero-water, zero-chemical method
Moreover, the harsh chemicals (such as hydrochloric acid, sodium carbonate, etc.) used during this process end up ...