资源描述
,-,-,郝倩莹专用课件,两份铝粉分别与足量的,NaOH,溶液和,HCl,溶液反应,产生的气体体积相同,(,同温、同压下,),,则这两份铝粉的质量之比为(),1,:,2,B,.1,:,3 C,.3,:,2,D,.1,:,1,D,2Al+2NaOH,+2H,2,O=2NaAlO,2,+3H,2,2Al+6HCl=2AlCl,3,+3H,2,2 :3,2 :3,拓展,提升,2CO +O,2,=2CO,2,分子个数比,2,:,1,:,2,扩大,6.0210,23,倍,26.0210,23,:,6.0210,23,:,26.0210,23,物质的量之比,2mol,:,1mol,:,2mol,质量之比,56g,:,32g,:,88g,化学计量数之比,2,:,1,:,2,体积之比,这个反应方程式的化学计量数可以表示哪些意义?,2,:,1,:,2,交流,研讨,1,、标准状况下,把,2.7g,铝放入足量,NaOH,溶液中,铝完全反应。计算:,(,1,)参加反应的,NaOH,的物质的量;,(,2,)产生,H,2,的体积。,/67.2L,0.1mol,2Al +2NaOH,+2H,2,O=2NaAlO,2,+3H,2,2mol,2mol,3mol,0.1mol,0.15mol,/3.36L,迁移,应用,2,、标准状况下,用铝箔包裹,0.1mol,金属钠,用针扎一些小孔,放入水中,完全反应后,生成的气体的体积是多少?,2Na+2H,2,O=2NaOH +H,2,2Al+2NaOH,+2H,2,O=2NaAlO,2,+3H,2,0.1mol,0.05mol,0.1mol,0.1mol,0.15mol,V(H,2,),=,22.4L/mol,0.2mol,=4.48L,迁移,应用,
展开阅读全文