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CaCO₃ + 2HCl ---> CaCl₂ + CO₂ + H₂O
100g CaCO₃ --- 2*36,5g HCl
10g CaCO₃ ----- xg HCl
x = 7,3g HCl
ms=7,3g
Cp=10%
mr=ms*100%/Cp
mr=7,3*100/10
mr = 73g roztworu HCl