Question

calculate the theoretical number of moles of HCl equivalent to 1 mole of
a) NaHCO3
b)CaCO3
c)Al2O3

Answer 1

Write out the equations and tell me what you think.

Answer 2

a)HCl + NaHCO3 -> NaCl + H2O + CO2

b)2HCl + CaCO3 -> CaCl2 + H2CO3
-> CaCl2 + H2O + CO2

c) Al2O3 + HCl -> AlCl3 + H2O + O2

hmmm
a) 1mole
b) 2moles
3) 1

??

Answer 3

oh! is it right? i need to multiply the number of HCl to 1mol/6.022x10^(23)?

Answer 4

a)HCl + NaHCO3 -> NaCl + H2O + CO2

This is fine

b)2HCl + CaCO3 -> CaCl2 + H2CO3
-> CaCl2 + H2O + CO2

OK also

c) Al2O3 + HCl -> AlCl3 + H2O + O2

very few reactions yield O2

3HCl + Al2O3 ---> 2AlCl3 + 3H2O

a) 1 mole - agreed
b) 2 moles - agreed
3) here 3 moles

Answer 5

thank you. i'm just confused what to use to find the number of moles, when there's mass and other given.

thanks for the help.