Question

Urgent va rog rezolvati problema!!! Dau coroana si 50p

Answer 1

ms = 50g, w% = 3,65%

w% = mdx100/ms

=> ms = mdx100/w% = 50x3,65/100 = 1,825g HCl

M.NaHCO3 = 23+1+12+3x16 = 84 g/mol

M.HCl = 1+35,5 = 36,5 g/mol

m g             1,825g

NaHCO3 + HCl --> NaCl + H2O + CO2

 84             36,5

=> m = 84x1,825/36,5 = 4,2 g soda alimentara