如何制备以下氢卤酸?HI ,HF ,HBr
问题描述:
如何制备以下氢卤酸?
HI ,HF ,HBr
答
HI
浓磷酸与NaI共热
3NaI+H3PO4(浓)=加热=3HI↑+Na3PO4
HBr
浓磷酸与NaBr共热
3NaBr+H3PO4(浓)=加热=Na3PO4+3HBr↑
HF
萤石与浓硫酸共热
CaF2+H2SO4(浓)=加热=CaSO4+2HF↑