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chawki
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Homework Statement
Base metal zinc (Zn) reacts with concentrated hydrochloric acid (HCl) forming gaseous hydrogen and zinc chloride.
STP conditions: pressure p = 101,3 kPa , temperature t = 0C.
The equation of state for ideal gas: pV = nRT
R = 8,314 J /(mol K)
Homework Equations
Write down the chemical reaction formula and calculate the volume of the gaseous hydrogen (H2) formed at STP conditions when 5,00 g of zinc reacts completely.
The Attempt at a Solution
2 HCl + Zn -----> ZnCl2 + H2
5g-----------------mH2
65.41g------------2g
mH2=10/65.41=0.152g.
nH2=mH2/MH2=0.152/2=0.076mol
PV=nRT
V=nRT/P
V=(0.076*8.314*273.15)/101300
V=1.703*10e-3 m3
V=1.703L.