Zinc reacts with hydrochloric acid according to the reaction equation
Zn(s)+2HCl(aq)⟶ZnCl2(aq)+H2(g)Zn(s)+2HCl(aq)⟶ZnCl2(aq)+H2(g)
How many milliliters of 2.00 M HCl(aq)2.00 M HCl(aq) are required to react with 8.55 g Zn(s)?
Balanced chemical equation is:
Zn + 2 HCl ---> ZnCl2 + H2O
Molar mass of Zn = 65.38 g/mol
mass(Zn)= 8.55 g
use:
number of mol of Zn,
n = mass of Zn/molar mass of Zn
=(8.55 g)/(65.38 g/mol)
= 0.1308 mol
According to balanced equation
mol of HCl reacted = (2/1)* moles of Zn
= (2/1)*0.1308
= 0.2615 mol
This is number of moles of HCl
use:
M = number of mol / volume in L
2.0 = 0.2615/ volume in L
volume = 0.1308 L
volume = 1.308*10^2 mL
Answer: 131 mL
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