Răspuns:
H2 + S → H2S↑ (combinare)
2HCl + FeS → FeCl2 + H2S↑ ( acid tare scoate acid slab din sare)
FeCl2 + H2SO4 → FeSO4 + 2HCl (acid tare scoate acid mai slab din sare)
HCl + Ca(OH)2 → CaSO4 + 2 HCl ( neutralizare)
2HCl + CaCO3 → CaCl2 + H2O + CO2
c) In conditii normale este gaz, usor solubil in apa si alcooli, pct de fierbere -85,5 °C, nu are culoare.
Se foloseste foarte mult in industria cauciucului ( obtinera cloropren), la obt clorurilor de vinil .
In industrie se foloseste la obtinerea acizilor Lewis( In the laboratory, anhydrous forms of the gas are particularly useful for generating chloride-based Lewis acids, which must be absolutely dry for their Lewis sites to function. It can also be used to dry the corresponding hydrated forms of these materials by passing it over as they are heated; the materials would otherwise fume HCl gas themselves and decompose. Neither of these hydrates can be dried using standard desiccator methods.)
d) 73 g sol de HCl 10% inseamna 73 x 10% = 7,3 g HCl
n moli de HCl = 7,3 : 36,5 = 0,2 moli HCl
2HCl + Ca(OH)2 → CaCl2 +2 H2O
2 moli HCl ..... 1mol CaCl2
0,2 ..... a
a = 0,1 moli CaCL2
m CaCl2 = 0,1 x MCaCl2= 11,1g
Explicație:
