Mm o problema la chimie de rezolva , va rog ajutati-ma cat de repedet:

Intr-o scoica se introduc cateva picaturi de acid si se observa aparitia unei efervescente.Scoica contine carbonat de calciu.Daca s-au picurat 1,46g HCl ce cantitate de produsi de reactie se obtin.Sa se exprime rezultatele in m si g.Multumesc anticipat!

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Răspunsuri

2014-10-07T19:18:52+03:00
M Hcl =1,46 gr
m CaCl₂=? ,m CaCl₂=?
m Co₂=?, n Co₂=?
m H₂O=? ,n H₂o=?
A O=16 ,A Cl=35,5 A CO=40, A C=12, A H =1
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M HCl-1×1+1×35,5=36,5
M CaCl₂=1×12+2×16=44
M H₂O=2×1+1×16=18
n=m supra M
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n= 1,46÷36,5=0,04 moli HCl
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REACTIA
CaCo₃+2HCl= CaCl₂+ CO₂+ H₂O
5 3 5