铜锌合金放入足量的稀硫酸中只有Zn和稀硫酸反应放出氢气.
Zn+2H+=H2+Zn2+
氢气质量=1.12*0.09=0.1008g合0.0504mol
Zn即为0.0504mol合3.276g
:(1)5克合金中锌的质量3.276g
合金中铜的质量分数(5-3.276)/5*100%=34.48%
把一块5克的铜锌合金放入足量的稀硫酸中,充分反应后,共收集氢气1.12升(氢气的密度为0.09克/升).求:(1)5克合金中锌的质量;(2)合金中铜的质量分数.
把一块5克的铜锌合金放入足量的稀硫酸中,充分反应后,共收集氢气1.12升(氢气的密度为0.09克/升).求:(1)5克合金中锌的质量;(2)合金中铜的质量分数.
化学人气:384 ℃时间:2019-10-17 03:54:39
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