题目

Sodium with 4.6g is reacting with HCl with 3.65g.How many grams of gas can we collect?When sodium is reacting with acid liquor,if sodium is excessive in amount,please watch out for the reaction of sodium and water

提问时间：2020-12-22

答案

在酸液中,4.6g钠与3.65g氯化氢反应,钠是否过量,一共可以产生多少气体,并写出钠与水的反应.
反应方程式：
Na + 2HCl = 2NaCl + H2(g)
2Na + 2H2O = 2NaOH + H2(g)
Na + 2HCl = 2NaCl + H2(g)
23 2*36.5 2
m0 3.65g x
23/m0 = 2*36.5/3.65 =2/x；
m0=1.15g
x=0.1g
与酸反应后钠剩余：4.6-1.15=3.45g
与水继续反映的钠为：
2Na + 2H2O = 2NaOH + H2(g)
23*2 2
3.45g y
23*2/3.45=2/y
y=0.15g
产生氢气总量为：
x+y=0.1+0.15=0.25g