公当燃着的火柴靠近电石和冰块时,火柴燃烧放出的热会使少量的冰融化成水。水和电石反应生成一种可燃烧的气体—乙炔,乙炔遇火燃烧,放出的热使冰进一步融化成水,而水又与电石反应放出乙炔。因此,火越烧越旺,看起来就像冰块和, i ①取适量磷酸钠和明矾放} l 在2个烧杯里,加水溶 When a burning match near a carbide and ice cubes, the heat from the burning of the match will melt a small amount of ice into water. Water and calcium carbide react to generate a combustible gas - acetylene, acetylene in case of fire burning, the heat released to further melt the ice into water, and water and acetylene react with the release of acetylene. Therefore, the more burnt the fire, looks like ice and, i ① take appropriate amount of sodium phosphate and alum put} l in 2 beakers, add water soluble