Thermochemistry | Exothermic and Endothermic Reactions

[@Hannah-tw1um]

Hii, it would really be helpful if you could do a a video on a past year paper about precipitates please......
You can use the website save my exams to do a past year paper on acids, bases and salts.
It would be helpful pls, tq

[@zakariyeidiriz7514]

Please do past paper of igcse edexcel o level please